You can make your own custom wooden shelves by following these steps. Step 1: Cut a piece of wood that is long enough to cover the width and length of the shelf you want to make. Step 2: Make a groove on one side of the wood so that it fits neatly into the other side. This will be used as a guide for cutting out your shelves. Step 3: Now, cut out your shelves using a jigsaw or scroll saw. You can use this template if you need help with cutting your pieces out correctly.