When you plunked down $2,000 on a new computer not too long ago, chances are you deluded yourself into thinking you'd do something really useful with it--like finally getting your finances in order. Or creating a digital photo album extraordinaire. But did you ever get around to such worthy pursuits? If you're like lots of people, you spend more time squeezing in a round of virtual checkers, listening to music online or sending instant messages to friends.
How do we know? Thanks to Web-tracking software that can trace your every click, Web-trend watchers are fully aware of your foibles. Scan...