Siegel said his school experiences taught him to buy index funds. You can't control market risks, but you can control costs.
Don't save too much
Steven Levitt. Author, "Freakonomics"
Salary rises steadily over time, as do outside opportunities. The right reason to save is so you can even out your consumption. When times are good, you should save, and when times are bad, borrow.
Buy low, sell high
David Herro. Manager, Oakmark International
Herro says over 30 years ago a stockbroker told him never to forget the cardinal rule of investing: Buy low and sell high. Today Herro relies on a spin-off of that rule: Buy good-quality businesses at low prices, even if it's counter to the crowd, and sell high, even if what you're selling is in vogue.