I am a dental hygienist and I tilt quite a bit too. One thing is to stretch the chest several times a day- whenever you can. I usually use a doorway and stretch one arm at a time because it's too conspicuous, and feels tender sometimes, to just abruptly do both at once.
Also every hour or so, stand up, reach to the sky, arch your back slightly and look up. Do shoulder rolls going backward (circle to the back). I'm doing them all now because this is my lunch break at work!
Sit as straight as you can and take breaks often. Even 3 seconds out of the tilt can regenerate you.
Another thing is not to neglect back strength, and do all the midsection (Cathe style abs, Pilates) you can, up to 3 x a week. Get plenty of cardio and full body strength work.
Hope this starts to help.
-Connie