How To Keep From Biting My Nails?

I've been doing good the past 5 days. (because my best friend came over and she stopped biting her nails so i stopped biting mine for the five days she was here) I'm doing really well since she left because my friend painted my nails with pretty polka dots and i dont want to ruin them. But i still get the urge to. They've actually grown a little! But i need some more methods to keep me from biting them for the next 2 weeks (thats how long it took last time i "quit") And i dont want to hear "Put nasty tasting stuff on your fingers!" Cuz that dont help.