Not the OP but I tell everyone on the market that one of the highest ROI things you can do is just go through your own past career history with a fine toothed comb and simply remember all the different things you did and be able to tell the story of each concisely and informatively (if possible, recall actual numbers and quantifiable impacts etc.).

When in an interview, when you're asked a question about your past experiences, the larger the library you have to draw on, the more likely you are to find an example that's relevant and persuasive. Even questions of the form "How would you deal with [hypothetical scenario]", I encourage applicants, if possible, to answer it in the form of "Oh yeah, that's interesting, we had to deal with a very similar case at [one of my previous jobs], here was my approach towards it".

After each interview, do a "l'esprit de l'escalier" retro, write down all the questions asked, what your answer was at the time and what you would have ideally answered now given the fullness of time to think about it. If there's a significant delta, that's a sign to go back and prepare more until your "real time" performance approaches your retroactive performance.