Smoke not only irritates sinus membranes, it also slows the motion of the cilia. When you blow your nose, do it gently. Clear both nostrils at once, even if only one nostril feels stopped up or is runny. Take a hot shower, or use a humidifier. Warm, moist air helps, unless you're allergic to molds.
Humidity encourages mold growth.
Gargle with a warm saltwater solution. This helps relieve a sore throat. Decongestant sprays can also bring short-term relief. But constant use has the opposite effect- your nose actually gets stuffy in response to the spray. Don't use decongestant sprays for more than 3 days.