Any tips on how to stop biting my nails?

i had the exact same problem. i have bit my nails since i could chew, no joke. lol:) but i recently started using this stuff i got from the store, its in a bottle that looks exactly like nail polish, except its clear and it tastes really gross if you chew on your nails (its meant for not chewing your nails) . also i have been taking prenatal vitamins to Enhance the rate of them growing, it really works! they are now past my finger tips, and i still haven't bit them! GOOD LUCK!