To add to this, think about keeping some surgical gloves on hand. If you are in a hot zone, wear 'em and change them often. You will slip up and touch yourself.

If you go germx or purell crazy remember to wear some lotion from time to time. Best time is while you are sleeping just buy a pair of cheap cloth gloves to wea so they lotion absorbs Hand sanitizers dry out the skin and the skin is the first line of defense against disease. ANY open wound can catch spray from someone who sneezed just as easily as your mouth or nose could.

Be proactive and pay attention to where people touch. If you have to open a door that can be pushed, don't use the handle but the door frame is the best example I can think of. An entire surface won't be contaminated from one touch, you can use other parts if you pay attention.