One that is flexible and open to new ideas and solutions.

One that doesn't second guess every step of the process.

One that doesn't watch over your workers and want to help.

One that doesn't have to be in contact 24/7.

One that shows appreciation for progress and quality.

One that provides baked goods once a week.

Verify that all window and door seals/weatherstriping is in good shape.

Check to be sure doors and windows are caulked properly (no gaps, cracks or missing).

If you have an attic access, treat it like door opening and seal properly. If possible, create an insulated cover to go over it in the attic.

Check HVAC ductwork for leaks and seal with foil tape or mastic.

Wrap your hot water heater in a blanket.

You can also look into programmable thermostats!

I would start with making sure your attic has adequate ventilation.