Breathing steam refreshes and soothes irritated sinuses, and it helps rid the nasal passages of mucus. While it takes some time, it will make you feel wonderful! Boil several cups of water and pour into a big bowl (or a plugged sink). Lean carefully over the bowl, and drape a towel over your head. Breathe gently for 5 to 10 minutes.
When you're finished breathing steam, use the water for a second purpose: Let the water cool until warm, saturate a washcloth, and hold the cloth on your sinuses (to the sides of your nose, below the eyes, and above the eyebrows).