A friend asked how I did mine, so I thought this would be helpful to others as well...
Go here for the tutorial by The Cherry Blossom Girl
Here's a picture of my nails from a couple weeks ago.
Another thing to do is Youtube 'half moon manicures' and there are lots of tutorials on how to do them.
P.S. I've seen the half moon manicure also done in a way that it looks like a reverse french mani, like so:
The size of the "half moon" can be big or small, however it suits you!