re: Pulled the trigger on a new construction home - tell me what I need to look out for

built my house 20 years ago and an architect named Doug Rye
from Arkansas had a tape out on how to build an energy efficient house. I followed about 70 precent of recommendations doing many myself.

Doubled my sq ft. and cut utility bills in half.

Living in coastal La. and only needed to turned on heater when outside temps were below 30 degrees.