Omelet Folding

I'll make this quick.  For all the times that I've made yummy scrambled eggs, I've never thought to make an omelet.  Mainly because I can't fold them correctly.  See?

There's a little bit of omelet fail going on there.  I can apparently fold them in a haphazard way...  but the perfect omelet fold eludes me.  I even waited until the omelet looked a little bubbly before trying to fold it.  Does anyone know if adding milk to it helps?  Any tips or suggestions to perfect my omelet skills are welcome!  

Alissa's Scallion, Mushroom, and Cheese Omelet