Nailbiting.. Any tips for stopping?

I started biting my nails sometime in elementary school and the habit still sticks with me today. I really do feel like it's disgusting but I do it pretty much subconsciously. I have gotten into the habit of clipping my nails if I ever allow them to get longer, but I usually end up biting them even lower shortly after I set down the nail clippers.

When I bite my nails, it is often because my nail looks unpleasing, and I kind of subconsciously tell myself that I can make it look more pleasing if I bite away at it. This never makes it look more pleasing.

I've thought about getting the bad-tasting nail stuff but never have.

Any other compulsive nailbiters? Any of you out there that have overcome it?

thanks

edit: i'm a guy