Understanding the constructive and destructive part of it (mochaik).
removing Tags from Clothing and Removing Pins from a New Shirt;
How long does a knot have to be tied to be considered a "קשר של קימא". (Knot of permanence).
ודבר דבר (Dabair Davar): Is One Allowed to Ask Their Friend to Do an Action That Is Not Allowed on Shabbos to Do It...