No more mini blind/Sharpie frustrations for me anymore. I cut up soda cans into strips and write on 'em with a ballpoint pen now. (Put a magazine or something soft underneath, you get better clarity/scribing.) Just punch a hole and wire them on to wooden stakes or directly on the trellis, cage, or even the plant itself. Pitch in recycle bin when done!
If you don't drink soda, (or don't want to wrestle with a can or trash your scissors) you can get a handful of thin aluminum flashing squares from any hardware type place for cheap. They're about 4x6 and come in packs. Score using a box knife & ruler, & wiggle until it snaps apart. Super easy.
And keep a journal with lists and maps.