I use Flonase daily which helps. In the past I have gotten two sinus infections a year which had to be treated with Augmentin, a very potent drug. When I have the actual sinus infection I am stuffed up and light headed.
I started using a saline solution, Arm & Hammer, daily and have not had a sinus infection for a year and a half. Saline solution is pretty much an alternate for using a nettie pot to clear sinuses. It is easier to use, though, since one does not have warm distilled water to use in a nettie pot.
+1
A sinus rinse - such as Arm & Hammer or Doctor Neil Med - (not just a sinus spray!) is extremely effective and need not be done all that often to see good results.