I tell you what, one regret I have as a ring-of-fire player who didn't make it to play for money is that I sat and studied all sorts of facts. Facts, facts, facts. People giving me books, telling me what to study, blah de blah.
And it didn't do one iota of good, because I didn't make it in the Hot Seat.
What I should have been doing is practicing Fastest Finger questions. Or playing video games, anything to quicken my reflexes. Now that there are Millionaire video games out there, play them, but only for the FF questions. Have your friends make FF questions for you to play. That would be my advice...don't worry about the questions in the seat as much as getting into the seat in the first place. I don't have too many regrets, but I do regret not practicing my reflexes more, because I might have been a tenth of a second faster.
I reckon it's probably a good idea to be as updated on the minutiae of current events and pop culture as possible. Read a few newspapers front to back on the plane flight. That's the kind of stuff where you're sitting and playing, and you say, "hey, I just read about this thing."
Good luck to anyone who's playing! Don't let Regis dawdle, get those questions in!