How'd the weekend go? Let's start the new week out right:
5 supersets X 20 reps of:
Incline Push-ups (elevate the feet up on a step or bench)
Supermans - lie face down on the floor with your arms stretched out in front of you as though you are flying. Using your low back muscles, raise your arms and chest up off the floor and simultaneously your legs. Squeeze your glutes tight as you do this action, then return back to starting position.
Once again, if you aren't ready for 100 push-ups, let alone 100 incline push-ups, in one session, then do what you can but just try. Break it up throughout the day as well.