Some of you may have already seen this 2009 Global Game Jam Keynote video, as it has been around for a few months, but I first watched it only a few minutes ago. As we will very soon be taking part in a 48 hour game development competition, I thought I might bring attention to this video.
Kyle Gabler give a number of great tips. His 2nd Theorum of Destruction is likely very true for a lot of people. I know for myself, the less I care the better my results become.