Youtubing...

https://www.youtube.com/watch?v=SpWBY9WlLeg
Christian Eich youtubing.

Also, good video by other on pushups, improve pushups? Every other day, diamond pushups, then normal and then, wide hands, do all until exhaustion, 6 sets. I think that's right. Hmmn, sounds worth trying. (check boot camp videos)

 http://www.baseops.net/basictraining/pushups.html

 http://jasonferruggia.com/top-10-ways-to-improve-your-pull-ups/

Pushups and Pullups