Some things I intend to do before cata, some I've done, some partially ...

- getting the explorer achievement, took longer than I expected and was fun to see those zone's I never saw - done
- glory of the hero, all the hc dungeon achievements are pretty fun (some quite challenging) and keep you busy for a while, and the mount is tmo pretty awesome - done
- complete all classic & outland dungeons (classic dungeonmaster achievement)
- doing the argent tournament quests for all horde cities
- kingslayer title on all 5
- loremaster, but that might be not very realistic
- get 100k honorable kills (doubt thats gonna happen, will be stuck at 85-90k)

I don't really mind if they are not finished by cata launch, most of those I can still do afterwards. It's just something that keeps me busy.