Well, since tylenol is perfectly safe in pregnancy, no worries there. I would avoid alcohol, second hand smoke, and limit caffeine (but you can certainly have caffeine). Also, daily PNV is a good idea. Other than that, just relax.
With all that said, I have been at this so long that I obeyed all the rules for the first 2 years, and now....well, I just live my life. I do take PNV, don't smoke anyway, and don't stress about a glass of wine and caffeine here and there.
Good luck....