21st Night is best used in a sprint with a clear goal at the end. Your task is to use 21st Night for 3 or 4 months, spending 10-20 hours per week in exhaustive review.
By the end of those 2 or 3 months, you should be ready to succeed at your task, be it a standardized exam, an intimidating interview, or a competition.
Here are some specific ways you might use 21st Night:
1. For a standardized test (like the GMAT, the GRE, the LSAT, or the MCAT)
3. To rapidly learn a lot of content
4. To master a complex process or skill
5. To teach a classroom or individual tutoring client to excel at any of the above