Tip 1: Detailed information on reducing your lighting energy costs.
Tip 2: Windows.
Tip 3: Preparing for the Heating Season
Tip 4: Computers and Energy
Tip 5: Reducing Outdoor Lighting Expenses.
Tip 6: Quick notes on the Easiest Ways to Reduce Your Utility Bills.

Other Handy Info

A Comparison of Energy Costs - How do various heat sources compare in price?
March 21, 2008 comparison of energy costs, including new heat pump calculations
Go on a Fossil Fuel Diet - Learn how to go cold turkey on fossil fuels for home heating!

Construction Tips & Techniques

Chimneys - Leaking chimneys and thermal problems. Find solutions here.
Stucco - A page with info and links to documents on stucco, water damage, and how to avoid it. If you're having stucco problems, start here!
Unvented roofs - Building Science document on the hows and whys of making an unvented attic.

Heat Pumps

Heat pumps can be the most efficient and cost effective way of heating your home. But they must be installed and sized properly. The following links go into the nitty-gritty of heat pump.
Arthur Hewett on heat pumps - a down to earth description
EERE Heat Pump Installation - The Dept. of Energy's document on heat pump installation
EnerGuide Heating & Cooling with a Heat Pump - Canadian energy efficiency organization document. Covers geothermal. A great introduction to heat pumps
Geothermal Heat Pumps - ETC Creations page and links to more information on geothermal heat pumps (aka ground source heat pumps)
Honeywell TH8321 Thermostat - This is the thermostat you need if you want true, multi-stage heat pump operation. Three heating stages are crucial for most efficient operation.
House Geeks Owner's Manual to Heat Pump Operation - a practical, non-technical document on using your heat pump
Refrigeration Basics Heat Pump Guide - Technician level discussion of how heat pumps work.