While the rest of the market catches up with Nest, here are some great videos guide to help you choose a programmable thermostat that's right for your lifestyle and schedule. There are also helpful tips on how to set the thermostat during the day and night. The second video is from SRP and shows how to install a programmable thermostat. An SRP energy auditor will also be able to tell you if your thermostat settings are best suited for your home. APS also gives some helpful advice at the link below.
http://www.aps.com/main/services/business/waystosave/buswaystosave_64.html
Enjoy!