Understanding the concept of "מדידה של מצוה" (measuring for a mitzvah).
Is One Allowed to Salt Vegetables for Immediate Use? Am I Allowed to Salt One Piece at a Time? Do I Have to Eat...
Folding a shirt collar, flipping up cuffs from pants, hanging up pants with a very sharp crease on a hanger, folding tablecloths and sheets...
Rolling Marbles, Nuts, and Balls Indoors and Playing with Kugaluch or Jacks on Shabbos;