On the topic of insulation....
Our utility company was running a special a few years ago, where an energy audit was $99 and you got rebates and tax incentives for work done by one of their list of contractors.
The energy auditor came to the house and checked everything out. He used an infrared camera to view the patterns of temperature around the house. He could see air leaks where they were happening throughout the house. He did a blower door test, where he hooked a powerful fan up to our front door blowing out, which pulled air through the house. It showed that we had air leaks at many of our interior walls (we have no attic and vaulted ceilings), at bathtubs, at outlets and switches, and at door and window frames.
He gave us that report, then we fixed a bunch of the issues, then he came back to recheck. Definitely helpful and certainly saving me money.
We were already planning to add insulation, so the timing was beneficial and we ended up getting rebates and tax credits for adding icynene spray insulation in our crawl spaces, sealing around windows and doors, and adding bat insulation to our basement walls.
Heather