דבר דבר (Dabair Davar): Understanding הרהור Hirhurim (Thinking, Thoughts);
putting a כלי (bowl, plate, container, etc.) under a candle to catch the sparks;
Understanding the Concept of מינו נצוד (a Creature That Is Commonly Trapped for Its Usage) and אין מינו נצוד (Not Commonly Trapped);