Whenever you make a sawcut in any woodworking project, follow it up with a quick joinery check. Use a reliable square and make sure everything looks good. it sounds strange but I see it all the time: People saw a joint and never bother to check to see if it’s square. Do this for all of your joinery. Dovetails, tenons, and, yes, even a simple lap joint. It’s a good habit to get into.