A couple of years ago I came across this program to get you to the point where you can do 100 pushups. About a year and a half ago I started the program and I got up to 84 before I lost interest and got away from doing anything but running. I noticed a couple of months ago that I was slouching a lot and I knew that it was time to get back to doing some of my core workouts. I got started on that in November and shortly after that , Amy put out a 30 day plank challenge. I took it on and it was a big help in keeping me motivated to get back into doing more core stuff on a regular basis. I didn't miss a day for about 40 days and I did get back to doing at least some of more core routine 3 or 4 days a week. I can already feel and see some results.
So a few days ago I decided it was time to get back onto the strength phase and so I am going to start at the beginning with the 100 push-up program and this time I am determined I won't quit until I get to at least 100 consecutive pushups. And hopefully after I reach that goal I can stick with the maintenance program. I know it is not going to happen in 6 weeks but I will keep repeating the last 2 weeks of the program until i achieve success.
here is a link to the program.