How to stop your Xbox 360 from crashing:
Fix Your Crashing X-Box 360 With String
mkraft writes "A gamer fed up with his new Xbox 360 crashing every 20 minutes has fixed the problem by raising the power supply off the ground with some string. Goldeneyemaster over at the GameSpot forums indicates that the main reason for his Xbox 360 freezing up is the power supply overheating. The solution is to lift the power supply off the floor and allow the air to circulate better around it."
Source: http://games.slashdot.org/games/05/1...?tid=211&tid=1