If you are skilled at using chopsticks, try rolling the omelet with them. Otherwise, use a spatula. (You can also find spatulas that are the same width as tamagoyaki pans to facilitate the rolling process.) To create a perfectly uniform, tight shape, you can turn the omelet out onto a bamboo sushi mat or piece of parchment paper. Firmly roll that around the omelet and let it sit for a few minutes before proceeding.