Sand the sheet of wood or door and your two stepstools using 100-grit sandpaper and an electric sander. Repeat with 220-grit sandpaper and then 360-grit sandpaper.
Rub the pieces down with a tack cloth, wiping off all the dust from sanding. Paint the sheet of wood or door and step stools a color of your choice using an oil-based paint and a 3-inch nylon brush. Give the pieces time to dry overnight and add a second coat, allowing it at least 12 hours to dry as well. Coat the table top and stools with a clear coat of polyurethane.
Position the two step stools 2 to 3 feet apart, depending on the size of your table surface. Adjust them so they are in line. Place the door or wood sheet on top. Use a hammer to nail two nails into each step stool.
Place storage baskets on the rungs of the step stools.