Howdy - First post here. I've got a few projects under my belt, and have learned enough to be trying to weed out my more obvious mistakes. The biggest struggle I have is getting my projects square and level, and candidly I find the "adjust for square" step in every set of plans to be mysterious.
What precisely does this involve? I tend to find that things look square when I'm dry fitting or laying out pieces, but once I glue, screw and clamp them up mistakes creep in. Some of this is probably the result of sawing errors (working on that too), but I would welcome any suggestions for "adjusting for square" at the time I join pieces together.