The only tricks I use are to make sure you choose the right size pan for the amount of eggs you are cooking. Often times I see people trying to cook a 3 egg omelette in something like a 10" pan which is too small, resulting in an omelette that is too thick and doesn't set on top before the bottom becomes too brown. Two eggs will work just fine in a 12" or larger pan, they will cook faster and more evenly too and the omelette will be easier to fold over without breaking. The other trick is to simply put a lid on the pan while the eggs are cooking, over a medium low heat, and the pan and lid do all the work. No need to keep scraping up the omelette like you see on cooking shows, the steam under the lid will set the top of the eggs perfectly. In fact, just towards the end of cooking, I will toss in my toppings, such as cheese, so they can melt too. I would be a little careful with eggs in the microwave as they have a tendency to explode and splatter.