How to cut into cakes with lettering on top. (E.g. Happy Birthday cake).
Cases when food, drinks, wax, etc. fell in an area where there is NO letters, numbers, pictures.
various important shailos in reference to dealing with HAIR on Shabbos;
Putting the Little Plastic or Rubber Cups on the Bottom of Chairs or Tables and Blowing Bubbles on Shabbos;