I need to start exercising and I came across this site a couple days ago. I figured maybe someone else here would be interested in it.
Doing a hundred reps of any exercise in a row would mainly increase your stamina, not your strength, which in the case of muscles involved in push-ups is pretty useless.
to the op: if you mix in some kind of pull movement (chin ups, some kind of rowing, etc), you would balance out the pushups. if you throw in hill sprints, too, you'll pretty much be hitting everything.
It's funny that I've just decided to reach this very goal. I did 75 once, now I can probably do 50-60. I guess that if I excercise daily and increase it by one every time, I'll get to the target in a month or two.
Current Xubuntu machine (old, quite slow, and past its 10th birthday, yet still surprisingly functional): Celeron 633 MHz | 320 MB RAM | Xubuntu 9.10
Good Diet and exercise is the best way (we've all heard it just about everywhere we go these days).
Just remember to mix in anerobic with aerobic activity. If you do only weightlifting, with now cario (like running/jogging/long walking), you can raise your blood pressure and such. You need both to become healthier