The only rule I have with eggs is to always leave the yolk runny, or to do a soft scramble or omelet. If you cook the yolk all the way you oxidize the good fats, which are very bad for you. In any case you don't get the benefits of the good stuff.

I know that's just nit-picking but I figure if your going to go ahead and eat all the eggs you want, you might as well make them as healthy for you as possible.