P.M.
My grandson learned to rinse (neti pot) his sinuses right away when symtoms appear, whether a cold or hay fever. It helps significantly, and he actually likes doing it (makes him feel capable and in control, I think). I do this too, but I just sniff saline from my hand — never could get the hang of that little pot.
Oh, yeah, I LOVE me some chicken broth — can I join you for dinner?
(BTW: The time-honored remedy of Vicks on the chest or feet gives some people comfort, but it has been found to increase congestion in many children, so experiment cautiously.)