well, about addons. At first, visit http://wow.curse.com/ to download Curse client, if u havent it already.
think that the most usefull is: Atlas, ArkInventory, Cartographer(must have, amazing thing), Questhelper, Titan Panel.
Just check available addons - im sure that u will find a lot of interesting things.
p.s. enjoy CCWatcher - it will help u in pvp)
