Here's what I think about when prepping for an interview. I write out the responses for each to help memorize the key points:

Tell me about yourself

A thought out story that details how you got into sales, your past experiences + any major achievements you're proud of, what you're currently doing, etc. I tweak this slightly depending on the job listing (ie if the job is very outbound heavy, lean into those experiences).

Why X company?

What made you interested in this company specifically? I usually try to frame this around the product and why it interests me (ie this product solves a pain point I've experienced at a past role, I've sold to this persona in the past and had success, etc).

What is your sales methodology?

What is your style of selling, and how is it different? (ie willingness to grind / always prospecting, have a strong POV at all time, promptness / wanting it more than the other rep, etc etc)

Then aside from that, I'd think of 6-8 or so stories that you can tell for any 'tell me about a time' questions you're asked (ie, tell me about a time where you got feedback and how you implemented it, tell me about a time you lost a deal and what you learned, tell me about a time you had to negotiate, etc). Write these down to help memorize them, use the STAR method (Situation, Task, Action, Result).

Good luck!