Tip One: garlic and horseradish tablets and ecinasia (sp?) are the best you can get for colds!
Tip Two: as soon as you feel you are getting sick e.g sore throat or stuffy head, then take a dosage of the tablets. They wont hurt you.
Tip Three: Try to eat healthy and get enough sleep each night. You'll keep healthy and prevent anything coming near you.
Tip Four: Fresh orange juice (or any fruit or veggie juice) is excellent for getting rid of sickness.
Tip Five: Get your hands on some REALLY good quality honey... look out for ones that are NOT heat treated as they hold the most anti-Bactria ingredients to keep colds away or help you get well fast.
Tip Six: add garlic to as many meals as possible! Nothing well come near you then lol!
Well I hope these tips are of help. They are probly common sense but are what I use!