Understanding the Difference Between טירחא יתירה (Tircha Yeseira, Major Exertion) and טירחא סתם (Tircha Stam, Minor Exertion) on Shabbos;
ממצוא חפציך (Mimtzo Cheftzecha): Reading Various Manuals or Literature on Shabbos;
Preparations for a Weekday: The Concept in Hachana Known as 'רגיל' (an Action Done Out of Habit and Not to Save Time for After...