Until the advent of the laptop breath-alyzer, here's Google's Mail Goggles, a Gmail program created to curb the tendency to e-mail while under the influence. The program uses the sobering properties of math to make people think twice before sending a Mai Tai-fueled love declaration to a co-worker or passive-aggressive missive to a relative. "Are you sure you want to send this?" a sky blue text box asks possible practitioners of this close cousin of drunk dialing. "Answer some simple math problems to verify." The e-mailer then has 60 seconds to complete five calculations before the letter is zipped to the recipient. The program auto-runs late on weekend nights, but can be tailored to reflect one's personal Happy Hours.

If the math test comes up short, Google cancels the e-mail and serves a round of advice: "Water and bed for you."