Look up bodyweight workouts. Mens health has a decent write up on it. You can also check out rosstraining.com as well as crossfit.com
There is another one out there that does that which I can't remember.
Basically burpee's, bodyweight squats, pushups, pull ups, dips etc...
"I am beginning to see you as something I might of stepped in... and I don't like the smell of it" -Burton (From Rad)
"Never, under any circumstances, take a sleeping pill and a laxative on the same night." -Dave Barry