90 Square Jig Clamp - great for keeping woodworking projects square!
Wedged Mortise & Tenon - Woodworking Techniques - American Woodworker It makes me do the work quicker and it makes me more effective too. Forcing something might trigger a kickback from the tool. This understanding helps the woodwork to last long.
credit: Matthew Cremona [https://www.youtube.com/watch?v=J0SDvKHcL5M]