Rule number ONE: Bring a hand truck, also called a two wheeler or some sort of dolly. This is particularly helpful for the less strong people of the group because it allows them to move more at a time and maximize their trips while you take care of the bigger stuff. Boxes always stack well upon each other up to a certain height, so as boxes make up the majority of what is usually getting moved, a two wheeler suddenly turns the weakling of the group into the most productive person allowing him to move 4 or 5 boxes at a time. Depending on the kind of dolly some transform into 4 wheel carts. This can be very handy for odd shaped things that are hard to pick up sometimes, like chairs or side tables.