Jon and I have started an endeavor called "One Hundred Push Ups" and this program basically trains you to do 100 push-ups in 6 - 8 weeks.
I'm actually okay if I never get to 100 but I know the training will at least tone my arms a bit! We're on week two and I'm right on track (this stage is still a little light for Jon unfortunately). Jon watches me and tells me when I do "good" push-ups. I don't think I do any truly poor push-ups (like sticking my butt up in the air or anything like that) but out of my averageness Jon likes to encourage me when my push-ups would pass the drill instructor's approval. We both did near 60 push-ups today broken up into 5 sets. I'm feeling it in my abs (which you should if you're doing drill-instructor-passing push-ups), shoulders and arms of course. Plus I've started looking up when I do them instead of watching the ground come at me all the time!
We try to do our exercises when the girls are sleeping. Last week Abi woke up as I was finishing up and she sat on me. Today she tried counting with Jon and counted "1! 2! 3! 4! 5! 6! 7! 8! 9! 10! 11! 12! 14! 14! 17! 19! 12!" Needless to say Jon lost track of how many he did :) I'll try to keep you updated on our push-up progress!