Passive solar & natural ventilation: Free energy is good!
Solar Electricity Panels:
pre-wire for photovoltaic cells (with limited storage) and install when cost effective.
orient south for winter heating and
block summer sun with overhangs
Solar panel assisted heating and hot water pre-heater for tank-less water heaters
Solatube.com for natural light
Large exhaust fan in kitchens that doubles for cooling (a whole house fan)
Cross ventilation and high exhaust windows for thermal stacking - fresh air without fans