I've been doing a lot of crossfit style workouts, similar to what Bob posted above. A couple I've liked:

"Murph" Run 1 mile, then 100 pull ups, 200 push ups, 300 squats divided as needed, run 1 mile

Run 200, 20 pull ups, run 200, 20 squats, run 200, 20 sit ups, run 200, 20 push ups - 5 rounds

I've also been swimming and rowing more because my knee dislikes me. When I swim, I try to do things like swim 300, 20 situps, 15 pushups, minute plank, kick 100- 4 or 5 rounds.