knees to toes
I've been trying to work up to "all toes" push-ups, too. Here's my technique: start the move on your toes (on the "up" side), then lower slowly down to the bottom position. When you get to the bottom, drop your knees down and push up from the knee position. After doing this for a couple of workouts (or whatever it takes for you to feel up to it), add in some "all toes" pushups at the begining (first one, then two...). You may also find that there is a certain point where you are weaker, and you can work on this by lowering down to that point and doing an isometric hold. I'm still not up to "all toes" (or, if I do it, my range of motion gets shorter as I go along, so I do more and more shallow pushups!) but maybe I'll get there someday!!