1) Compendium. How could I ever run a game without such a tool?
2) Character Builder. Although I did like the offline-one better I can live with the new one and acknowledge WotC's will to continue working on it.
3) long pause...
4) Dungeon. I like having adventures at my disposal. The current adventure format is good for my way of running the campaign because it's pretty easy to extract one or two encounters.