Winter is coming! Ok, maybe not. But just in case, go ahead and check out the Energy Star website for some helpful tips on properly sealing up your home.

The site gives advice on insulation and heating, ducts and appliances. But here’s the fun part…you can do your own energy audit. You’ll need 12 months of utility bills, but once you put in a few hours finding those (I know I’m not the only one who doesn’t file), the quizzie itself takes about 5-10 minutes.

If you want to call in a pro for the audit, they list partners.

Related: Get tax credits for efficiency!