I bite my nails - it's really frustrating sometimes, cause I want them to be long and pretty but gah I always revert to biting them!
have you tried fake nails? I know a lot of people who tell me to do this and do it
religiously! if you break or bite one off, get a replacement right away
and they say soon your regular nails will be long enough to get a manicure and once they're pretty you won't want to bite them anymore
I pick my lips too! and usually until they bleed
get like a lip exfoliant, or massage them with a soft tooth brush (takes off dead/dry skin) and mosturize them daily as often as you can
good luck