"Smart drugs" are supposed to make you smart, but it's not always smart to take them. Until smart drugs are safer and more effective, there are some alternative mental-performance enhancers to try that are both interesting and legal.
Concrete ideas to modify and expand this hack go here.
Freeform discussion of this hack goes here.
Errata go here.
This is a page for a hack from the book MindPerformanceHacks by Ron Hale-Evans.