Never Eat Soggy Waffles is a fun mnemonic device to help you remember the cardinal directions--North, East, South, and West! Using mnemonic "memory tricks" or device like this one is a great way to remember difficult facts.
Teaching Area and Circumference of Circles through Discovery
Use graph paper to demonstrate the ratio of PI for both Circumference and Area. Refer to the demonstration of Circumference performed for you in the last Math Antics Video, What is PI? Use that demonstration to come up with your own for the ratio of PI when calculating the Area of a circle.