You can quickly make your own outline patterns from existing assembled wood parts with just a piece of white paper and an awl. Position the paper over the piece you want to duplicate and then rub around the edges. Remove the paper and lay it over your new wood. Next, following the creases, punch small holes into the wood with the awl. For straight lines, a hole at each end is sufficient. On curves, make holes closer together. Remove the paper, draw lines between the holes, and you are ready to cut.
Before you glue up wood for a project, examine the parts. If at all possible, start out with cleanly cut, perfectly straight boards of the proper thickness. Take out any bow or warp before you begin your gluing work. By using straight and true stock, you won’t have to force the boards in one direction or another, and you won’t have to get into tricky, complicated clamping set-ups.