The change that made the biggest impact was in our master bedroom closet. We noticed that it was extremely cold this winter. On each side of the closet we have these little doors that lead to extra storage. Jason noticed that the storage areas weren't insulated and were on the exterior of the house. So he insulated the storage areas and added lights. Eventually we will sheet rock and carpet the space so we can store totes and luggage in it. But for now the insulation was a HUGE help. Our closet is no longer freezing cold!
One last change we made was to the attic door in Olivia's bedroom. Don't have a clue why they would put the access to the attic in a bedroom, but oh well. We noticed that her bedroom was colder than the others so Jason decided to try insulating the door to keep heat from escaping.
He used 1x4's and plywood to build a "box" inside the attic door. To enter the attic you simply push the box up. It's attached with piano hinges. The box is insulated with batt insulation on the attic side and XPS insulation around the 2x4 frame that it sits on. He sealed where those two meet with foam weather stripping.