hundred pushups

I have started doing the Hundred Pushups program. Well, I started a little over 3 weeks ago. The other day I did 100 pushups for the first time. It took multiple sets and wasn't all at once, but it will be.

Also, I am combining it with a couple of other bodyweight programs. "Two hundred situps" is from the same place as Hundred Pushups. However, instead of doing crunches like they suggest I am doing full situps as described in the Marine fitness guide. I am also doing the Armstrong Pull up program.

My goal is to be able to do 100 pushups, 200 situps, and 20 pull ups.