Since June I've been doing regular 30-minute class sessions in an effort to learn how to draw hands. There's been a definite improvement: my 30s hands look a lot less like pencils stuck in plasticine, and when I'm out peoplewatching I'm no longer afraid to at least attempt the hands (actual outcome may vary but it's the thought that counts). Strangely enough I have the most trouble with seemingly straightforward gestures - edge-on, palm or dorsal view - possibly because it's harder to bluff my way through the anatomy.
(I killed my grey pen doing that last one.)
I feel I should change my routine a bit, focus more on full body poses instead of just hands 24/7 - maybe practice basic 3d shapes and lighting, too, as I spend far too much time working out where to put the shadows instead of thinking "this shape = this kind of shadow", which probably won't help me much in the long run.
Any and all advice welcome!