That's a good idea Lisa, I have a friend who does something similar and what I do when layout is more of an idea than an exact precision move, and that's to load everything onto a thread. You simply take a largish needle and a double length of thread, tie a knot and then put a little folded square of fabric (or paper) on the end and stack your laid out pieces on the thread. She did indeed have little 1, 2, 3, etc. tabs. Now she made her's while playing with a new embroidery machine and I am typically just using scraps.
It keeps them in order and prevents them from getting shifted around or flying across the room when you stumble over the dog or something. Among my vision issues is a lack of depth perception and unfortunately I drop things a lot, so I like the security of pins or some sort of way to secure the fabrics as well as the position.