Using napkins, pre-cut paper towels, Pampers, etc. with letters, pictures, numbers on them.
Inserting Stuffing into a Couch Pillow, Detaching Connected Toothpicks, and Putting Back an Unattached Chair Seat or Cushion;
using pointy stickers on Shabbos;
how to work with different parts of the eyeglasses on Shabbos;