A handy little list like that with an exercise(s) I could perform daily to keep my upper body in shape would help...the trick is I would like an exercise to target each muscle group without the use of any equipment.
Click on the body part. When the page comes up, use the "Sort by Equipment Type" and select "Body Weight Exercises Only"...voila. Once you've done your selection, you can also use the "View a printable page of the results" to create a summary and pic for each exercise.
Check out simplefit.org and crossfit.com for some ideas for exercises.
I've been in the Army for 15 years. We spend a ridiculous amount of time doing body weight exercises. I don't think they're as effective as using some equipment, but they're helpful. Google this:
That's the Army's fitness training manual. There's a good explanation of body weight programs. You can learn a ton about different types of push-ups.
I saw some guys in a nearby formation using sandbags. Sandbags are an incredibly inexpensive way to use weights. You can do some great functional exercises with them. I would also recommend finding a pull-up bar. For $20 you can have an austere gym.
You'll at least need a pull up bar to effectively work your back and biceps. Otherwise you'll just have to stick with variations on the push up. I have seen a push up variation where you put your arms out in front and do a short motion. I guess that will work your back some.