In Figure Drawing, one of the keys to maintaining vitality and life in a drawing is down to how you handle exaggeration. I always try to push a pose 10% further than what’s in front of me. That way, when the drawing settles down you still have something with life and not a stiff facsimile. This can also apply to proportion. I find it’s a good exercise to push proportion till it ‘almost’ breaks. Sometimes you go too far but but that’s half the fun of it!