Your mind is like your computer's random-number generator: it needs a "seed" from the environment to break out of its routines. You have to put something into it to get something out!
You can read the full text of this hack at oreilly.com.
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.