So WoW Insider has been leveling an alt lately (yes, despite the fact that it makes their skin crawl a little bit, they have been leveling a Paladin so they can tank and heal with dual specs when they show up), and their biggest problem isn't the XP, since Blizzard has nerfed the leveling time so much. It's not the quests, either -- between Questhelper and having done the 1-60 jig five or six times before, They are all set for quests now. Nope, it's managing my inventory -- they are questing so quickly that the biggest problem they have is just keeping bag space open.
So here's a few tips they have picked up along the way. Even if you're not leveling, maybe some of these will help.