take an old screwdriver or file and rub it back and forth at a 45 degree angle around the nose and tail of the board. all you are doing is dulling the factory sharpened edges so that if you turn hard you do not catch a hard edge. Not to much will do the trick. Where the board side edge starts to run into the nose / tail is where you want to start and finish.
As for wax. I run a purl, swix, burton or 1ballJ all temp. Its a pretty safe bet for all temps. Waxology is a definate science that is only achieved after some zen like training. DO NOT let a shop convince you that the quick wax (done with a machine) is any good. Make sure that the shop does it the old fassion way with a bar of wax and an iron. Get it done the night before, but make sure that you do not pull it off the roof rack and take it in. Let it warm up first. After waxing, keep it near (not on) a heat source. This will get the wax to soak into the base. If you ride more that 2 or 3 days, get it done again. It will make your day that much better. (try offering the shop guy a 6 or 12 pack of beer instead of $$$)