heavy bag work (this tends to be fairly free-form, but usually includes me working sets of combinations, with an entry)
staff kata (I like the grip exercise it necessarily entails, the balance work, the body conditioning, and just the focus time)
stick work on heavy bag
What I work on changes with my aims. Right now, I'm not working on anything specific, so am enjoying this set. I've got some foot surgery coming up, and when I get started back after that, I'll be focused on balance. Likely, I'll start out with a lot of kata, to avoid much strain on the foot. Then I'll probably do a lot of kick drills once the foot is ready.