Understanding the constructive and destructive part of it (mochaik).
ממצוא חפציך (Mimtzo Cheftzecha): Various Types of Cases Where the Person's Actions Might Not Be So Recognizable;
Understanding the concept of separating "pesoles" (bad) from "pesoles"(bad). Ex. Separating recycling from the rest.
How to Handle Fish in Relation to the Melacha of Tzod;