I've researched some on forums and talked to my vet. I can't seem to curb her habit. I need advice--not criticism

I know this has to do a lot with how I train my puppy....but I was wondering if you guys could give me suggestions. My dog bites--hard--when she greets me(whether it be one hour or several). (She's a sucker for attention).
She is a jack Russell mix so she can also jump at me when I hold my hands to my chest.
Ignoring her doesn't help but giving her the *sit* command temporarily stops her from biting. She gets overly excited and I'm not sure how to get her to relax.

how old?

Discipline her when she bites.

Burn it and start over.

5 months. And she's really stubborn.

lemme guess: she is teething (and with that type of dog it can take up to 12 months)

ensure she has something to chew on, eg raw-hide, and always tell her "no" when she tries to nip/chew your hand
it will take some time, my new puppy is now 9 months old and still at times tempted to 'nip'
(since he is a larger dog his teething was finished a few months ago)

Btw she snaps so it's not teething it's the tendency for small dogs to nip. She is notoriously rough with her toys and I only give her chews every now and then. So I guess I'll try giving her non-food toy to play with when I get home. "I'm-home-you-can-play-toy"

Thank you for the advice. I'll give it a shot.
Has anyone had luck with the spray bottle with water?

I used to have a full-blooded jack russell that would do the same thing. Everytime I walked in the door he would go crazy and try and nip at my hands and feet to get attention. I eventually broke this habit by simply disciplining him and then putting him in the kennel right after.

i'd say give her a nip back, but i'm not a dog owner