I also wanted to post a video of the standard warm-up that we do each session. This is by no means a definitive warm-up and if you have specific mobility issues then they merit extra attention. It does however a provide a nice general warm-up to establish range-of-motion at each joint. Coupled with a few sets of dropping snatch balance and muscle snatches with an empty bar and you are good to go.
Finally, just on the subject of handcare, I picked up a big tub of Emulsifying Ointment from the pharmacist's the other day. This is perfect for putting on your hands after training, and costs a fraction of the price of the brand-name stuff (£3 vs £12 at my local shop). It is exactly the same stuff, but wasn't on the shelf at my pharmacist's, I had to ask for it. So if you're after some greasy ointment for your hands, look out for this. Don't forget to sand your calluses down with medium grit sandpaper first - this will stop then catching on the bar and tearing.