Eric Luhta, who I went to AM with for a while, wrote How to Cheat in Maya (which has a lot of the approaches you learn in AM in it) and now has re released it with new stuff and a guest author Kenny Roy (who I learned a TON from).
They have couple of videos on their site, and any time you see Kenny Roy in a video it's worth paying attention!
vid on 2ndary animation (he touches on his frequent spiel of 2ndary animation = subtext which is a useful idea) but this idea of using animation layers to allow you to build up your animation and make changes easily is one I was vaguely aware of but haven't had a chance to explore. But here he is making it seem like a very useful approach allowing for late changes without headaches. Example here was having a tapping finger on a new layer, so can key it in and out easily to play with the thought shown through 2ndary acting happening.
vid on buffer curve: saw this from him elsewhere but it's a great cheat to re write it down, basically if you use buffer curves it's like having a save as alternate version of animation just by using the swap buffer curve button