The Only Investment Guide You'll Ever Need by Andrew Tobias
A penny saved is two pennies earned.
-- because of taxes (page 13)

This book covers a lot of minutiae with regards to personal finance. Most of this can be overlooked by pretty much everyone, and instead summarized into:

  1. Put yourself on an automatic saving regimen
  2. Self-insure for as much as you can (your car)
  3. Avoid debt unless you're using it to make money (your house purchase)
  4. Invest when the market crashes, if you can afford to not have that money for 10+ years
  5. Don't trust anyone to make you rich; do your own analyses
  6. Taxes matter; be conscious of after-tax returns