With the amount of walking that you’ll do at Walt Disney World, blisters are always a possibility. Wear shoes that are broken in and fit correctly. Too loose or too tight can cause rough spots. Also, wear dry socks, and keep an extra pair on hand in case they get wet. (Bring some zipper bags so you don’t get your stuff covered with wet sock smell!) Many people recommend moleskin. I’ve never tried it, but I’ve only heard great things.