Aside from practicing your answers to possible questions for a second interview, there are other things to contemplate and anticipate:
Loose ends to tie up — Was there a question from the first interview that you didn’t answer completely? Or did the interviewer mention that they wanted to cover a topic but ran out of time? Remember those loose ends from the initial interview. Prepare for them so you can respond more fully during the second interview.
Off-the-wall questions — Some employers enjoy asking tricky questions, such as, “If you were stranded on an island, what’s the one item you would want to have with you, and why?” to see how well you think on your feet. These questions also test your problem-solving skills and reveal a bit of your personality.
Stories to tell — Sell yourself with a few success stories of past accomplishments. Don’t just say you’re good at what you do. Stand out by giving specific examples of how you’ve helped solve a problem or dealt with a specific challenge at work, and present that information in a way your interviewers are likely to appreciate.
Discussion of the next steps — At the end of the second interview, the interviewer will likely tell you what happens next (possibly a third interview) and when you will hear from them. Or they could offer you the position on the spot. If the latter happens, don’t feel compelled to decide right then. Let the employer know you want time to decide and when they will hear back from you. And, if they don’t mention next steps, be sure to ask when they will be in touch or if you should follow up.