Fans of last-minute barbecues can take a clue from their favorite build-it-yourself brand ... shelf and then evening out the table top with a piece of plywood. To do this, you'll need a tool ...

But before you do that, consider building your own ... The guide shown here is just a narrow piece of 3/4-in. plywood attached on top of a wider piece of 1/4-in. plywood, with a squaring fence ...