There are small, back-of-mind behavioral shifts that can save large amounts of energy, because consumption varies dramatically between comparable buildings, depending on how their occupants behave. Based on the findings of 36 residential pilot programs, the American Council for an Energy Efficient Economy (ACEEE) has reported that 12% savings are possible for programs with real-time information and feedback.
These types of programs cost about $.0.035/kWh, or one-third what Americans typically pay for household electricity.
Ehrhardt-Martinez, K., K. A. Donnelly, and S. Laitner. 2010. Advanced Metering Initiatives and Residential Feedback Programs: A Meta-Review for Household Electricity-Saving Opportunities. American Council for an Energy-Efficient Economy, June. link