Pre-Interview Preparation: The 24-Hour Checklist Before Every User Interview

The hour before a user interview decides the quality of that interview. Skip the prep and you waste a participant's time and your own. Run the prep checklist and the conversation flows, the recording works, and the insights are sharp by the time it ends.

This guide gives you a complete 24-hour checklist for preparing for any user interview — moderated or AI-moderated, remote or in-person — and shows how AI-native research platforms like Koji eliminate most of the manual prep work so you can focus on the conversation, not the logistics.

Why Pre-Interview Prep Matters More Than You Think

Most failed user interviews do not fail because of bad questions. They fail because of broken tech, missing context, no clear research goal, or a moderator who arrived too tired to listen. Nielsen Norman Group research on interview failure modes specifically warns: "Avoid scheduling all interview sessions back-to-back with no breaks; interviewing is tiring, and without breaks your later interviews will be of poor quality."

Pre-interview prep covers four buckets:

1. Research prep — do you know what you are trying to learn?
2. Participant prep — do you know who you are talking to?
3. Logistics prep — will the tech work?
4. Personal prep — are you ready to listen?

Each bucket has a checklist. Run all four every time.

The 24-Hour Checklist

24 hours before: Research prep

☐ Re-read the research brief. The research brief defines the research question. Read it again. If you cannot articulate the primary question in one sentence, you are not ready to interview.

☐ Review the discussion guide. Read the discussion guide end to end. Note which questions are essential ("must ask") vs. optional ("ask if time"). In a 45-minute interview you will typically get through 5-7 deep questions, not 20 shallow ones.

☐ Note your hypotheses. What do you currently believe the answer will be? Write down 2-3 specific predictions. After the interview, you will check which ones held up. This is how you avoid confirmation bias — by stating your priors explicitly so you can be wrong out loud.

☐ Check your bias list. What outcome do you secretly want? Awareness of this is the first defense against leading questions and other research bias.

6 hours before: Participant prep

☐ Read the participant screener responses. If you do not know what role this person has, how long they have been a customer, and what segment they are in, you will waste the first 10 minutes asking questions you should already have answered.

☐ Look up account context. For B2B research, check: account size, plan tier, tenure, feature usage. For B2C, check: signup date, last-seen date, key events. The goal is to enter the interview already curious about specific behaviors — not asking generic warmup questions.

☐ Note any specific anomalies. Did this customer file a recent ticket? Drop usage three weeks ago? Cancel and re-subscribe? Anomalies are interview gold; surface them in advance so you remember to probe.

☐ Customize the opening. Generic "tell me about yourself" wastes 5 minutes. Personalized opening — "I see you have been using us for 18 months and recently switched to the team plan; I would love to hear what prompted that switch" — gets to insight in 2 minutes.

2 hours before: Logistics prep

☐ Test the recording setup. Open your recording tool. Record a 30-second test. Play it back. Confirm audio levels, video framing, and that the file saves correctly. Recording failures account for a meaningfully high rate of lost interviews — the cost of a 30-second test is nothing compared to losing the data.

☐ Test the call link. Click your own meeting link. Confirm it loads, you are in the right room, and screen-sharing works if you will demo anything.

☐ Charge devices and check connection. Laptop on charger, phone on backup hotspot, headphones tested. If you are remote, run a connection test.

☐ Verify the calendar invite is accurate. Time zone, link, and any pre-call instructions to the participant. Wrong time zone is the #1 cause of no-shows.

☐ Prepare the consent form. Have it ready to share. Get explicit consent for recording at the top of the call.

☐ Set up your note-taking environment. Whether you use a dedicated note app, a paper notebook, or AI note-taking, have it open and ready. Do not fumble with software in front of the participant.

30 minutes before: Personal prep

☐ Take a real break. Nielsen Norman Group interview failure research explicitly calls out exhaustion: never schedule interviews back-to-back without breaks. Aim for at least 15 minutes between sessions.

☐ Eat and hydrate. A 60-minute interview requires sustained attention. Low blood sugar shows up as missed follow-ups.

☐ Re-center on listening. Do a 60-second exercise: close your eyes, breathe, and remind yourself that your only job in this interview is to understand this person's experience. Not to validate a roadmap, not to defend a feature, not to demo anything.

☐ Open your hypotheses note. Last glance before the call. Do not open the discussion guide yet — you do not want to read it during the call.

5 minutes before: Final checks

☐ Close all unnecessary tabs and apps. Slack, email, calendar notifications. Mute everything that could ping mid-call.

☐ Open your discussion guide and notes side by side. One window for the guide, one for notes. Test that you can switch between them without looking down.

☐ Start recording the moment the participant joins. Once you have verbal consent. Do not wait — the first 30 seconds often contain the warmup gold that contextualizes everything later.

What to Bring (Even If You Are Remote)

A practical kit, prepared once and re-used:

• Discussion guide — printed or in a separate window
• Hypothesis note — what you currently believe
• Participant context one-pager — name, role, tenure, anomalies
• Consent form / verbal consent script
• Note template — pre-structured so you are not designing it on the fly
• Backup contact info — participant email and phone for tech issues
• Time-keeping mechanism — a visible clock you trust, not just the call window

The Two-Person Setup (When You Can)

Whenever possible, run interviews with two people: a moderator who asks questions and a notetaker who captures verbatim. The moderator focuses entirely on listening; the notetaker focuses entirely on capturing.

If you cannot have two humans, AI note-taking is the modern alternative. Koji handles the notetaker role automatically — transcribing in real time, tagging structured question responses, and generating a draft summary the moment the interview ends. The moderator gets to stay fully present. Pair this with active listening techniques for the cleanest interview output.

A Compact Checklist You Can Print

For teams that prefer a one-page reference, here is the entire checklist condensed:

Day before

• Re-read research brief
• Review discussion guide; mark must-ask vs. optional
• Write down 2-3 hypotheses
• List your biases

Same day, 6h before

• Read screener responses
• Check account context (tenure, plan, usage)
• Note participant anomalies
• Draft a personalized opening

Same day, 2h before

• Test recording (30-second playback)
• Test call link
• Charge devices, check connection
• Verify invite time zone
• Prepare consent form
• Open note-taking environment

30 min before

• Take a break (not back-to-back)
• Eat and hydrate
• Re-center on listening
• Open hypotheses note

5 min before

• Close all unnecessary apps
• Open guide and notes side by side
• Start recording when participant joins (after consent)

Common Pre-Interview Mistakes

Reading the discussion guide for the first time on the call. You will sound robotic and miss follow-up opportunities. Read it the day before.

Skipping the participant context review. Asking a 5-year customer "how long have you been using us?" signals you did not prepare. Participants notice.

Back-to-back scheduling. Three interviews in a row degrades the third by 30-40%. Block recovery time between sessions.

Not testing the tech. "Can you hear me?" "Sorry, my mic is not working" — these eat into research time you cannot get back.

Forgetting to record consent. "Is it OK if I record this conversation for our internal notes?" — explicit verbal consent at the start of the recording is the minimum bar. For some jurisdictions (GDPR in particular), written consent is required.

Trying to memorize the guide. Do not. Use it as a reference. Your job is to listen actively, not perform a script. See how to moderate user interviews for in-call tactics.

How Koji Helps

Koji eliminates most of the manual prep work so the moderator can focus on the conversation:

• Auto-generated discussion guide — Koji creates the discussion guide from your research brief, so you do not draft it from scratch
• Participant context cards — Koji pulls account context, screener answers, and prior interview history into a one-page brief automatically
• AI moderation option — for studies where you want async or always-on interviews, Koji runs the full interview with an AI moderator using your discussion guide
• Real-time transcription and structured tagging — Koji transcribes the call and tags responses to your structured questions live, so you can focus on listening
• Consent and recording built-in — Koji handles consent collection and recording compliance so you do not manage that infrastructure
• Post-interview synthesis in minutes — Koji generates the draft summary the moment the interview ends, eliminating the synthesis backlog

Teams using AI-assisted research tools report significantly faster time-to-insight, which means more time for the parts of prep that only humans can do — building hypotheses, choosing what to probe, and staying genuinely curious about each participant.

Related Resources

• Discussion Guide Template — the document you are reviewing in your prep window
• Research Brief Template — where the research question lives
• Structured Questions Guide — the 6 question types that make every interview comparable
• Remote Interview Best Practices — additional tactics for video-call interviews
• How to Moderate User Interviews — the in-call companion to this pre-interview guide
• Research Bias Guide — the biases your prep should help you control for
• AI Note Taker for User Interviews — how AI eliminates the moderator-plus-notetaker setup
• Active Listening Techniques — what to do once the interview starts