Sep 14, 2012 9:35 AM
The Nest Learning Thermostat ($249) is a smarty-pants device that takes a week to learn how you like your home, and then does the regulating for you. It's designed to turn the heat (or air conditioning) down when you leave the house or head to bed at night, and it'll use your temperature history to help you build good energy-saving habits. The best part is the easy access to your Nest from your computer or smartphone. With it, you can regulate your thermostat from the office, or even from the car on your way home from work.