If you want to be able to do lots of pushups that's the way to go about it.

How many pullups can someone do if they can do 100 pushups?

I bet some muscle groups are missing their fair share of workout such as the complete set of abs and lower legs.

I got fired up a few years ago and got some SEAL workout tapes and books. Kicked my own ass in the gym several times a week and was sore for a year. Put on muscle mass, lost body fat, never been stronger. (Then some life events killed the flame for a long time so I relapsed.)

Be careful where you put your hands!