Ludum Dare 18 is coming up and I'll be participating in it. I've done a couple other short-term game competitions in the past but this is my first big one (and my first solo one). I am REALLY excited for it, but I'm wondering if there are any tricks to preparing for this sort of thing, and any advice on what to do while in the competition. So...
How do you best prepare for, or participate in, a short-term game competition?
Your answer can be specific to Ludum Dare but I'm really talking about any game competition, as long as it's short-term -- not the month-long ones where you casually develop your game and release it; I'm talking high-pressure, finish-in-time, pull-an-all-nighter type competitions. The Global Game Jam fits here as well, if you participated in that earlier this year.
Also any tips in the context of a group of people (each working on their own solo game) would be great; I will be with the game development club at my school for most of the 48 hours (only a few other people, not a huge group).