AS MUCH sleep as humanly possible.

My magic sick curing pasta - with half a jar of crushed garlic in it. Bloody strong taste but God it makes you feel better in the morning.

Warm saline up the nose - then blow - get as much phlegm out as possible so the body is more clean and clear to heal itself.

Give all your piercings a quick saline soak too - mine get all gross when I get sick. Just in case :-)