beat me to it. i use the hex dumbells because of a wrist injury. i'll do pushups heavily on periods i can't get to the gym, like vacations. four sets of fifty before breakfast will usually get the blood flowing and the chest pumped. then i'll try half a set of diamonds and/or with the feet elevated.

the pullup is my paradigm exercise. i tell anyone who asks for fitness advice to get a pullup bar and to stop eating preservatives.