- Paint your nails! If you have an awesome design on your nails, it's much harder to destroy it! Plus, who likes the taste of nail polish - yuck!
- Dip your fingers in nail polish remover in the morning (non-acetone), the taste will help deter your fingers from getting near your mouth.
- Think. Think of everywhere your hands have been that day - door knobs, chairs, kitchen counters, trays, etc... Do you really want all of those things to be in your mouth?
- Finally, wear a rubber band. Every time you bite or peel your nails, snap it! Soon you'll associate biting/peeling your nails with a stinging pain.
Hope this helps! If you're still really having trouble, I can give you some more tips!