"צביעה באוכלים" (coloring in foods) - the stringent view of some poskim
How to Handle Matzah Meal Which Has Pieces of Matzah (Larger Pieces) in It;
How to Remove Gum, Paste, or Sticky Substances; Walking with High Heels on a Dirt Ground; Removing Twigs, Pebbles, etc. with One's Foot;
How to Deal With Putting Items Into the Refrigerator, for Example Sodas, That One Will Need for מוצאי שבת (Motzei Shabbos);