Welcome!
One easy trick I've used that seems to be successful in quickly teaching dogs not to jump on people is folding your arms across your chest and shuffling your feet forward into the dog's space. No words, no kneeing her chest or treading on toes, just shuffle forwards and invade her space. That forces the dog to try to walk backwards on it's hind feet. That's a very difficult maneuver if you're four-footed, so the best option is to get down on all fours again. Then as soon as she's down, ask her to sit and reward her with lots of petting. Repeat as often as necessary.
If she goes behind you and tries to jump up, keep turning so you face her and shuffle forwards again. Try to anticipate her jumping up and fold your arms before she does jump.
If you do this enough times (get everyone involved, including your friends) she will learn that as soon as your arms cross your chest, she has to keep all four on the ground. Then she gets petted when she sits, which is the attention she wants anyway. Pretty soon she will give up trying to jump at all.
Give it a try. Well a bunch of tries, but it seems to work fairly quickly, and is a simple and humane way to get your point across without scolding, pushing, jerking, etc. The best part is that anyone can do it anywhere. Kids need to be especially persistent, making sure they don't flap their arms and squeal when the dog jumps up.
Another alternative is to kneel down to her level so she doesn't have to jump. She's only wanting to greet you in a doggie manner...lick/get in your face...which is normal dog behavior. But it's not always convenient to kneel and doesn't really teach her anything.
If she seems to be an anxious or needy girl, she is probably jumping up to get you to comfort and reassure her. I had a girl that was like that. I taught her to jump up on command and used that whenever I thought she was anxious or needed a "high five" embrace from Mom. Gave her a brief hug and then all was fine. But I had to teach her not to jump first.
Good luck with the UTI's and let us know how it goes.
Im so glad I found this site! I have a 10 month old Newf, Sadie, that has truly made my life better...She is my first ever dog and we are happy to have found this place. Shes had a few health issues (recurring UTIs) that have brought us here to newf.net and theres still a few behavioral issues that need fine tuning (jumping up on guests) but she is the most amazing dog and I have really fallen in love with the breed and cant imagine ever going through life without a dog again!!