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.
If you are installing new shop lights or positioning a workbench in your shop, a simple test can help you find the position for best illumination. Hold a pencil or dowel vertically, then check for shadows. Reposition your set-up to reduce shadows as needed. If you have strong shadows on one or more sides, consider buying more lights.