Learning how to incorporate your rudder control is important. What happens if your landing at a RC field that has one runway, and you've gotten yourself into a pretty hefty crosswind situation? Rudder is your friend. You dont have to overdo the rudder, just tiny uses with your rudder. play with it, See how it works and see how it reacts when you use rudder.

Add a bit of right rudder, left ailerons, keep adding a little more of both and watch how the plane flies... straight, but at a crab.. thats what you will need to do in a heavy crosswind landing, its also useful for recovering from stalls and other basic manuvers on landing..

Using your rudder is important for clean flight, but its not the end of the world if your not using it right away.