I keep singing "It's upper body time, it's upper body time" to the tune of the Howdy Doody theme song. I know, I'm really dating myself. Since I can't do much cardio due to the tear in my meniscus (at least til after I get the cortisone shot next Tuesday) I've been focusing on doing upper body strength work.
I'm doing dumbell lifts to strengthen my forearms, biceps, triceps, shoulders and upper back. I love weight work. I do 3 sets of decreasing reps 15-12-10 using 5-10 lb weights. It's a pretty good workout. I follow it with some good old fashioned stretches from Bob Anderson's book Stretching for about 15 minutes. My muscles are nice and warm and tingly after that. I've used his movements for many years and they never fail me.
I do the weight workouts on alternating days and the stretching everyday. Love it!