Here's my routine when I start feeling ill and it continues through the illness:
Strip my bedding and wash it with my towels, cloths, clothes and anything else I've touched in the past week. By some sort of antibacterial wipes and wipe down all light switches, phones, remotes, doorknobs, cupboard handles, etc.
I do that daily while I'm sick, to make sure I don't leave any germs anywhere for anyone else — myself included.
Juice, juice, juice. Both apple and orange. As much as I can stomach.
I take the maximum allowable dosage of vitamin C, too.
My entire daily intake of food is apples, oranges, bananas, carrots and chicken soup.
Call in sick. Stay in bed. Hot, hot shower before bed.
It may not all work, but it fools me into thinking it does. It sure makes the flu seem to pass faster.