Plagued with sinus problems? Rinse your nasal passages twice a day to flush out pollen and other irritants. Put saline solution (a 1/4 teaspoon salt and 1 cup warm water) in a plastic squirt bottle or a nasal irrigator, a spouted container that allows you to pour water directly into your nose. The solution should fill your nasal cavity and spill out the other nostril. Gently blow your nose afterward.