A good exercise I like to do is trying to draw figures from memory. If i see a cool pose or something while drawing from life I'll try to hold it in my head and draw it again later. The key is to identify something that makes the pose interesting. It could be the way a hand twists, the way a head tilts, or just an interesting shape you see. It doesn't matter what it is as long as it gives your mind something to hold on to. Focus on getting that one thing down and the rest will fall in to place.
Here are some of my rememberings from a drawing workshop last night.