Something what I'm doing (still have to do on quite a few toons). Is doing the grizzly hill dailies only each day. Takes about 20 minutes per team, and per week you gain 1 level. That is for the teams i'd leave at 75. Over the course of 2-3 months (dont think cata will be released any sooner) it's pretty easy to get them to 80 that way. Never know what it's good for.