This is one of the weirdest books... http://www.oreilly.com/catalog/mindhks/ 

A collection of sample hacks is also presented online:
 Hack 11: Why People Don't Work Like Elevator Buttons (PDF)
 Hack 16: Map Your Blind Spot (PDF)
 Hack 17: Glimpse the Gaps in Your Vision (PDF)
 Hack 24: Create Illusionary Depth with Sunglasses (PDF)
 Hack 33: Neural Noise Isn't a Bug; It's a Feature (PDF)
 Hack 43: Improve Visual Attention Through Video Games (PDF)
 Hack 65: Why Can't You Tickle Yourself? (PDF)
 Hack 92: Make the Caffeine Habit Taste Good (PDF)