13. Make Square Crosscuts
Norm Abram has a bagful of old carpenter's tricks, like this one for ensuring that he's holding his saw blade perpendicular to the wood he intends to cut. Simply rest the teeth of the saw on the edge of the cutline and look for the reflection of that same edge in the blade. Adjust the saw slightly until the reflection matches up with the actual edge of the wood. This will prevent you from straying off your cutline or angling your blade as you saw through the thickness of the wood.