I swear by Jame's guides. Just use his, and skip collection quests. Though, I still do the collection quests with decent drop rates.

Horde: http://www.wow-pro.com/leveling_guid...leveling_guide
Alliance: http://www.wow-pro.com/leveling_guid...leveling_guide

I soloed my BE priest to 60 w/ that guide in about 5 days /played, 7 days /played to 70.