You may think of your heating system primarily as a source of physical comfort, but in the winter it can protect your home against devastating damage. To ensure that your heating system stays on task, consider a Wi-Fi-connected thermostat like the Nest. The technology offers you the convenience of being able to control your thermostat from anywhere, via any Internet-enabled device. But more important, Wi-Fi thermostats provide real-time system alerts, so if your heating system were to fail, you could take action immediately—before frozen pipes and related hazards endanger your home. Available on Amazon; $249.