One of my favorite figure drawing/anatomy books is a series by George Bridgeman. Here are some recent drawings I've worked on:
In addition to this, I've been going to live figure drawing sessions on the weekend at the Palette And Chisel Academy Of Fine Arts Chicago. The sessions are "quick sketches" going from one minute to 60 minute drawings.
10 minutes, 15 minutes, 25 minutes
It is essential for any artist that draws human beings to go back and do live figure drawing and anatomical studies from time top time. It is the only way to, not only remain sharp, but to also improve skills.