Make a program consisting of:
Push ups
Clap push ups
Pull ups/chin up
Towel grip pull ups/chin up
Towel pull up/chin up
Weight pull/chin up
Hand stand push up
Dive bomber push ups
Explosive push up
Also, do some core work:
Back extensions
V ups
Knee hugs
Bicycles
pillar
side pillar
Flags
Side crunch
I highly recommend you buy ross enmaits never gymless it's only 30$'s and is one of my most valuable peices of equipment I have today.
RossTraining - Bridging The Gap Between Ordinary and Extraordinary