How can I effectively fill screw holes in wood to prepare it for reuse?

To effectively fill screw holes in wood for reuse, you can use wood filler or putty. First, clean out the hole and make sure it is dry. Then, apply the filler or putty to the hole, making sure to overfill slightly. Allow it to dry completely before sanding it down to be flush with the surface. This will create a smooth and even surface for reusing the wood.