Writing letters, numbers, images using chocolates, nuts, sugar, salt, licorice, etc.
understanding some of the problems which may arise when using makeup on Shabbos;
ודבר דבר (Dabair Davar): Mentioning Something That Somebody Will Do After Shabbos When It's Not Allowed to Be Done on Shabbos Itself;
putting down items on the ground in a slippery area. Raising and lowering a chair, fan, etc. Putting down sand in a slippery area;