Warm, non-caffeinated beverages, like tea, fight dehydration, soothe a sore throat and break up congestion. "Hot liquids help to loosen secretions in the chest and sinuses, making them easier to expel," says nutritionist Andrea Nakayama. If tea isn't your thing, you can boil water with lemon and add fresh ginger or honey. "Lemon is loaded with vitamin C and full of immune-boosting phytochemicals. Ginger and honey are also immune power boosters and the ginger helps bring down internal inflammation within the nasal passages." To make Nakayama’s honey-ginger-lemon remedy, steep a half-inch knob of ginger in 1 cup of boiled water. Pour that mixture into a mug filled a quarter of the way with lemon juice and a tablespoon of honey. If you don't have those ingredients, keep it simple and brew a cup of herbal tea doesn't contain dehydrating caffeine.