Anyone who has been at a scrap day with me has seen "The Fork Bow" because I use these cuties all the time. I've been asked to post a tutorial for them, but I'm not big fan of re-inventing the wheel, so I'm going to give you links to a couple of great tutorials. The Forking With Di tutorial is the original one that I found a couple of years ago. Make some bows today! I promise they will put a smile on your face.
Forking With Di
Happy Bird's Crafting Haven - Fork Bow