Sinus problems aren't necessarily all in your head -. Endeavour to avoid polluted, dusty and smoky environments, as well as anywhere there is second hand smoke. If you can eliminate milk products from your diet. this includes staying away from prepared foods that list milk as an ingredient, this will cut down on the forming of mucous. Try this for about 60 days and see how you feel.
Adding vitamins C and E, which are antioxidants can help protect you from the damage caused by exposure to environmental toxins such as cigarette smoke and pesticides etc.