Unlucky for me.. my father passed down his genes for chronic sinus infections. The only thing that has helped us other than antibiotics is sinus flushing. It's like the neti pot but better I think because you get some force to flush the water through the sinuses. I use 1 cup warm water mixed with 1/2 tsp of non-iodine salt. Then use a suction bulb (like the kind you get at the hospital) on each side until the cup of water is gone. It forces the water through the sinuses without harming them. When I'm just preventing one, I do it 1x a day but if I end up getting a sinus infection I do it 2x day along with mucinex, humidifier, etc. Good luck and hope you feel better!
DS 2005
DD 2007
DS 2010
and a Junebug in 2013