Multiple omelettes usually means one person has to do the cooking and then everyone can't eat together. AllRecipes has the solution by boiling them in a bag, which lets you make up to eight omelettes simultaneously.
Tamagoyaki -- those sweet little Japanese omelettes -- are traditionally made by rolling thin layers of egg on top of each other into dense stacks. They're delicious, but challenging, and Yuji Haraguchi of Okonomi has developed a way to make the tasty yellow squares in an oven.
I know an omelette doesn't technically have to have cheese to be an omelette, but I don't know why you'd want to eat one without one (lactose intolerance excluded). "The more cheese, the better," is my motto and, as such, I'm pretty obsessed with the "inside out parmelet" in the above video.