This is what I do. I square the material. Scribe a line on the short side. Cut a wedge to the angle I need. Set the plane on the wedge and mark a line on the bench at several places on the bench. Set a straight stop at that point. Put the work clamped to the bench with the high side of th miter in line with the wedge. Plane away until you get a full shaving. Check to the scribed line. I did this twelve times for the top of my chest I'm building. I'm interested to know how others approach this task. Included a couple of photos for reference.
Jim
Sorry about title error