"As all have not faith, seek ye diligently and teach one another words of wisdom." (Doctrine & Covenants 88:118)
Teaching others is probably one of the most powerful ways to learn. When you teach others, your mind has to formulate your knowledge into a communicable series of words, thereby forcing it to review the information. Not only that, but your "students" will most likely have questions or comments, which creates more discussion and learning.