I do my corners like Jenny does, but you do not need to take it out of the machine to do that. Just keep the needle down, turn the quilt, pull binding taut down the next side and put that tuck in there. Lay it flat and you are ready to lift the needle and move it over to the seam line. No need to cut the thread.
I also press a triangle into the beginning of the binding strip and that is my ruler. That's how much the overlap will be. No need to go get a ruler or eyeball it. Cut it off at the base of that triangle.