I've found the sauna or steam room loosens up the sinuses. I prefer Ricola original cough drops for any cough. As crazy as it may sound, exercising at least enough to sweat seems to help--as long as you aren't coughing and irritating your lungs more with added breathing.
The most important thing--and you hear it all the time--is probably to keep hydrated. Keep caffeine to a minimum. It will dehydrate you more easily when you have a virus. I drink a lot of sugar free drinks. Excessive sugar will sap you of your energy, rather than helping. Obviously, water is okay, but it doesn't really satisfy me, as I usually drink iced tea all day.
Spicy soups seem to make me feel better (I sometimes eat one of those cups of ramen, and add cayenne pepper powder--sometimes just broth from bouillon with cayenne added provides sinus relief.) My favorite is Tom Yum Goong, Thai spicy lemon grass soup with with shrimp. You can probably also get Kimchi spicy noodle bowls at WalMart in the asian section.