הכנה ליום אחר (Preparations for a Weekday): Sleeping on Shabbos to Do Work or a Mitzvah on Motzi Shabbos;
מחמת חסרון כיס Machmas Chesron Kis: Animal Food;
(Melting ice.) understanding the difference between "מוליד" and "נולד"; leaving out frozen items on a counter;