What the investment community does like is short-term measures designed to boost share prices.

As technology improves, on-screen avatars look more and more like real people. When they start looking too real, though, we pull away. These almost-humans aren't quite right; they look creepy, like zombies.

Technology is supposed to make our lives easier, allowing us to do things more quickly and efficiently. But too often it seems to make things harder, leaving us with fifty-button remote controls, digital cameras with hundreds of mysterious features and book-length manuals, and cars with dashboard systems worthy of the space shuttle.

Academics, who work for long periods in a self-directed fashion, may be especially prone to putting things off: surveys suggest that the vast majority of college students procrastinate, and articles in the literature of procrastination often allude to the author's own problems with finishing the piece.

Under the right circumstances, groups are remarkably smart - smarter even sometimes than the smartest people in them.

Unlike most government programs, Social Security and, in part, Medicare are funded by payroll taxes dedicated specifically to them. Some of the tax revenue pays for current benefits; anything that's left over goes into trust funds for the future. The programs were designed this way for political reasons.

You might think of consumption as a fairly passive activity, but buying new products and services is actually pretty risky, at least if you value your time and money.