My tip is to get some rest before you leave for your trip. It's very easy to get run down before your trip with running around, packing, getting everything ready. You will wear yourself out and the first germ to come your way will find a new home.

I was notorious for getting sick either right before or during my trips to WDW. Now, I make sure I am as rested as possible before my trip. Just getting to the airport, the flight etc to get to your resort can be exhausting. You don't want to start behind the 8 ball.

Last trip last month...got sick the day after I got home.