Pro tip: Painters tape trick fixed my wobbly miter joints
I was making a little storage bench for our back porch and the miter cuts on the lid were all off. They kept coming out uneven, so the corners had gaps you could see light through. I got frustrated and almost scraped the whole thing. Then I thought about using painters tape to mark the angle from the first good cut. I stuck the tape right on the wood, drew my line, and moved it to the saw. The next piece slid into place with no wiggle. It took a few test cuts on scrap, but finally it worked. My oldest kid said it looked professional, which felt awesome. Such a simple fix for a problem that was driving me nuts.