I truly believed that hiking in my shoes was what I was supposed to do and that hiking in my shoes prior to my trip would actually work against developing blisters. After doing research on the web, I learned several ways you can prepare yourself so you don't get blisters. To prevent yourself from going through the needless pain of small shoes, buy big shoes to wear on your hike. When you start with three layers of socks, big shoes will turn into nicely fitting shoes. You are sure to have no problems with your shoes feeling too small.
Small shoes cause friction, resulting in blisters.
If your shoes start feeling small, simply go down to two layers of socks. Your first layer of socks should be thin, preferably nylon. Nylon will reduce friction. The second layer could be cotton socks. The third layer should be a top of the line hiking sock.