http://health.yahoo.net/articles/healthcare/photos/superfoods-fight-colds#0

1. Garlic
2. Citrus fruits
3. Oily (omega 3) fish
4. Anise seed
5. Oysters (for zinc)
6. Fennel
7. Yogurt and kefir (probiotic bacteria)
8. Tea
9. Red peppers
10. Milk (vitamin D)
11. Mushrooms
12. Turkey breast (skinless)
13. Arugula and other leafy greens
14. Blueberries
15. Cocoa (>70%)
16. Brazil nuts
17. Carrots
18. Sweet potatoes
19. Sunflower seeds
20. Oats

for me, its candy and cookies. it seems to work.