Something that many R/C pilots never really learn is to fly a good solid landing pattern. This allows you to concentrate on the landing more easly when you always set it up the same each time. With enough practice you can more easly see when to make adjustments to altitude or airspeed before it becomes a problem. Find a trim setting for landing and always use that setting, this will give you the same airspeed (or close to it depending on fuel load) every time. With a landing trim setting you just need a little throttle up to slow the descent or throttle back to increase the descent. You will find that this will make for a very easy approach and landing when your not chasing the airspeed with the elevator. Remeber use your trim through the whole flight. It's not just a one time adjustment. Full size A/C trim for airspeed in all phases of flight, and models should also. Once you really learn these areas you will more easly be able to improvise later.