Mentat: Wiki on becoming a better thinker
This wiki is a collaborative environment for exploring ways to become a better thinker. Topics that can be explored here include MemoryTechniques, MentalMath, CriticalThinking, BrainStorming, ShorthandSystems, NotebookSystems, and SmartDrugs. Other relevant topics are also welcome. How have you made yourself smarter?
Since I’m under a bit of a deadline today, I’m going to just link to this site and reluctantly walk away, for now; so many fascinating tricks, heuristics, and mental parlor games. I’ll definitely be coming back to learn the calendar feat and the Dominic system.
(In other news, I really wish I were just being schticky when I say that I remember virtually nothing from the 7-week Mnemonics class I had in college. Seriously. Nada.)
Puzzle Palace

All kinds of puzzles for you to waste your
time away with. Have fun.
Erich’s math puzzle page.
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So true, so...