Here’s a great way to hold boards for routing and planing with ne’er a worry that they’ll slide around or flop over as you work. Clamp two handscrews to a sawhorse or tabletop so their jaws are lined up. Slide the workpiece into the jaws and tighten the handscrews.
Medium-size handscrews have 5/8 in. of usable jaw surface above the screws, so they grip the board like two long-jawed vises. This tip is especially useful when routing molding profiles on narrow boards. You can also screw the handscrews to a piece of 3/4-in plywood on your shop floor and use them to hold doors for edge-planing.