Don't overheat your pan. Crack eggs into buttered pan and start whisking them with the fork in a fast horizontal waving fashion. Once they are foamy, tilt pan, add cheese or filling to the thin side. Level pan, start to lift the edge around the circumference of the pan. If the egg is cooking too fast, lift the pan off the burner. When you go for the use the pan to shuffle/slide the egg into the corner, not the fork or spatula.
Hope that helps.
