Here's a tip: Any one can be a DJ. An-knee-one. All you need is a decent music collection and the ability to read a crowd. What you don't need is the Boy George-Ambush-Windtunnel-Makeover flair and a complete inability to transition songs. iTunes even does that for you, so your only job is to stand there and look cool, which I may add, will be no cakewalk.
