Good candidates lose offers by winging it. An hour of prep the night before changes how you sound, because you stop searching for examples while someone watches you think.
Almost every behavioral question maps to one of five: a problem you solved, a mistake you fixed, a conflict you handled, a result you are proud of, and something you learned fast. Write one line for each. When the question comes, you are recalling, not inventing.
Situation, task, action, result. Set the scene in one sentence, say what was yours to do, describe what you did in two or three sentences, and end on the outcome with a number if you have one. Sixty to ninety seconds per answer. If you hear yourself passing two minutes, land the plane.
It means "give me the trailer, not the movie." Present role in one line, the relevant past in two, and why this job is next in one. Stop talking. Ninety seconds is plenty.
Know your floor before you walk in: the number below which you will not take the job. If you can, let them name a figure first - "I would like to understand the full scope before talking numbers" buys time. If pressed, give a range whose bottom is your real floor, not your wish.
"What would success look like six months in?" and "Why is this role open?" tell you more than any answer you give. Having no questions reads as not caring.
Send a short thank-you email the same day. Two lines, one specific thing you enjoyed discussing, done. And never bad-mouth a former employer - it is the one answer that sinks strong candidates.
General guidance, not career counseling.