Drink lots of fluids
You can't defeat a cold by flushing it out of your system, but drinking lots of fluids can help. This is both a powerful preventative measure and an effective remedy if you're already sick. Clear broth, juice, decaffeinated herbal tea, water and lemon water with honey all help keep you hydrated and loosen uncomfortable congestion. Avoid dehydrating liquids like alcohol, and caffeinated coffee or sodas.