The Dodow is an unassuming object: About three inches in diameter, it sort of resembles a coaster. But it's a sleep device that's pretty well beloved, albeit pricey, and very simple to use.
Armed with a blue light and three AAA batteries, the Dodow sits on your nightstand and helps guide your breathing as you try to drift to sleep. The device has two "breathing modes," one eight-minute exercise and one 20-minute exercise. If you change your mind midway through the eight-minute mode, you can...