[NCFR!!]

Everyone has mentioned the Judging Guide - Another GREAT resource is to get to one of the Judging seminars that all of the regions hold in the winter/spring. You will learn A LOT more at the Seminar than just reading the guide. Also - if you can find some people near you who fly IMAC, go practice with them - even if they are a little ways away. Lastly - learn how to fly striaght lines. That sounds easy and almost a no brainer, but go out and try to fly from one end of the field to the other - maintain the same altitute, same distance out, wings level, etc. It is harder than it sounds.