I've decided to start off doing a basic strength program. I haven't lifted weights in a few years, so I have to work my way back into it. I currently have a set of adjustable dumbbells, with a 5 to 52.5 lb. range on each dumbbell (so 105 lbs. total max). I've been doing the following:
2 sets of 5 reps, 1 set to failure
Bicep curls (none of the others really hit these!)
I do the last set to failure because I can deadlift, bench press, and row more than the max weight of my dumbbells. I'm going to join a gym soon, so I can increase the weight.
For "cardio" I play "Wii Sports" boxing for 30 mins. or so. More fun than running!
In the future, when I'm in better shape, I plan on joining an MMA gym near me, AMA Fight Club. They have a few current UFC fighters training there (notably Dan and Jim Miller). I'm a huge MMA fan, and I used to wrestle in high school and college. It was a lot of fun, and I want to take it to the next level.