Here's an easy way to improvise when you're running out of clamps around the woodworking shop. After spreading glue, set the work to be clamped on top of a scrap piece of plywood. Then, use scrap wood across the top of the work, spaced 12 inches apart. Using three-inch drywall screws, secure the straps to the bottom plywood. Remove them after the glued boards have dried overnight.
For more on woodworking, consider:
How To: Build a Sawhorse
5 Easy Woodworking Projects for Beginners
DIY Workbenches: 5 You Can Build in a Weekend