I hit this topic a long time ago, and got some great advise. I am confident this will be my most comfortable year ever.
Change your socks mid day. Get a good pair of insoles with good arch support. Get boots that fit. If you are hunting warm weather, don't pack on extra socks. If you don't want to get a smaller boot, you are better off to get a thicker insole that will snug up the fit so you can wear a normal sock layer. Let your feet breath as much as possible. Definetely watch the videos from Guy Eastman.