If you're worried about that important phone call waking up your baby or interrupting your dinner party, this Silent Light Phone Sensor could be an elegant solution. Hook it up to your telephone with the included 7.5-foot cord, and when you receive a call it will light up with a soft, unobtrusive blue LED light. You'll need to be facing the light for it to really work, of course, but perhaps by setting up a series of mirrors throughout your house it will be visible from anywhere. Or something like that. I can't do everything for you, people. In any case, the light only works on traditional land line phones, not on mobiles, so even if your phone's vibrate feature can't be felt through a sheet of paper let alone through jeans pockets, this thing won't help you. If you're still hanging out in the 20th century with your land lines, however, you can grab the Silent Light Phone Sensor for $20. — Adam Frucci

Silent Light Phone Sensor, via Tech Ticker