sagittal leg swings (front to back), frontal leg swings (side to side), lateral hip rotations, scorpions (lay on your stomach arms out to the sides and try and bring your heal to your opposite hand, and arm swings. also that site above has good stuff.
all this stuff is dynamic stretching, so make you get a light warm before doing them.
i find that dynamic stretchs before working out makes me feel alot stronger compared to static stretching