- Go Fix Yourself!
- A new compendium of cranks
- An old compendium of cranks
- Are you a crank?
- A skeptical guide to the universe.
- Some motivation à la Murphy
- The dictionary of obscure sorrows.
- Physicist and plasma zen master Daisuke Shiraki seriously wrecking a piano
- Robert J. Lang's page on the mathematics of origami

- Villon's straight tip on the booze and blowens.
- An existential essay by Derek Parfit
- Brandon Carter's article on numerical coincidences and anthropics.
- Scott Aaronson's attempt to address what's the largest number?

- Jerry Coyne's why evolution is true blog (which covers far more than it's name might imply).
- Sean Carroll's physics blog
- Peter Woit's not even wrong page
- Terence Tao's math blog
- Scott Aaronson's Shtetl-Optimized page
- Cosma Shalizi's research and personal page
- John Baez's website
- How to succeed in life according to my former professor Mike Develin
- Prashant Athavale's weblog tutorial on image processing for "noobs"

- Godel's incompleteness theorems
- Fitch's paradox of knowability
- Benford's law of scale-invariance
- A list of unsolved problems in mathematics
- Max Tegmarks mathematical universe
- Stanislaw Ulam's prime spiral
- The possibly undecidable Ulam/Collatz/Kakutani HOTPO conjecture
- Some quite remarkable properties of the square root of two
- Some equally remarkable formulae for the ratio of the circumference of a circle to its diameter
- The Gauss-Bonnet theorem linking geometry and topology
- The Banach-Tarski paradox
- Turing's Entscheidungsproblem
- The subtle and beautiful Hahn-Banach theorem
- Wilczek and Gross' result that nonabelian gauge theories are asymptotically free
- The vacuum is polarized
- Zeckendorf's theorem

- Classic archived New York Times crossword puzzles
- Project Euler numerical challenges
- Harvard's daily Putnam problem
- The compendium of Putnam problems
- LA Times daily crossword puzzles
- Mike Develin's daily word game
- A hard travel IQ game

- A whole host of hard guitar pieces by the inimitable Ted Greene