Don't be a germaphobe. Don't wash your hands a lot. Give your immune system a little work out each day by not babying it.

Try not to take any medicines unless you absolutely need them, and stay away from hand sanitizers. If you do need to clean anything, soap is more than enough and water is usually enough.

I thought it was normal to be over 50 and not take any medicines, but all the doctors and staff were surprised by this when I got my colonoscopy recently.