To summarize, 9 things you must do after a cold: 1. Get plenty of rest and sleep; 2. Take a moderate amount of Vitamin C; 3. Eat some dark chocolate; 4. Turn on your humidifier; 5. Eat fluid foods; 6. Drink plenty of water; 7. Control certain dairy products; 8. Take over-the-counter medications if necessary; 9. Call your doctor for anything unusual and be patient until it passes.