Place your shoes in shoe trees after you take them off. Cedar shoe trees have several advantages over plastic trees. Not only do they do a better job of maintaining the proper shape and size of your shoe, but cedar absorbs moisture, which will help prevent foot odor from permeating the lining of shoes. You can find cedar trees at shoe stores, better department stores or online.
Push the rounded, half-foot shaped end of the foot tree into the front of the shoe, then push the back end down onto the insole. The back end should press up against the back of the shoe, helping the shoe to maintain its length, while the front of the tree works in the toe cap and welt of the shoe to maintain their shape.
Place the shoes on a flat surface in a cool, dry location, where they will not be tampered with. Polish and buff your shoes at least once a month, even if they aren't being worn regularly, so they maintain their new appearance. A shiny leather surface draws viewers' eyes away from a crease.