Feynman Technique
Choose a concept you want to learn about.
Pretend you are teaching it to a student in grade 6.
Identify gaps in your explanation; Go back to the source material, to better understand it.
Review and simplify.
Nolan Technique
Choose a concept you want to make a movie about.
Pretend you are explaining the concept to someone with a Ph.D. in it.
Identify parts of the movie that were simple to understand. Go back and edit them out.
Reorder parts of the movie while playing some backward.