With some miter-clamping methods, you need to grab a square and make sure the corner is exactly 90 degrees. Not so with corner clamps; they automatically hold parts perfectly square. They're available at home centers and online.
Improve your woodworking skills and glue joints with these 18 tips to show you how to clamp like a veteran woodworker. Our pro shows you shortcuts that eliminate the need for a stack of expensive or special clamps.