I love when other people do all the work: Anna of Too Many Annas has posted a guide to guides on 3.0/WotLK. Go get educated! Learn what you have to start QQ’ing about know to be the best!
Well, second best.
I’ll also plug my own guide, on reaching the (spell) hit cap at level 80 without setting foot in anything harder than a heroic.
Stop used to be a warlock, then he was a death knight; first he was Horde, then he was Alliance again, and now he's Horde again. For good this time. Lok'tar ogar! 