Insulate the attic. Insulation helps stop drafts throughout the house. In the attic specifically, however, insulation provides an additional benefit. Here, it works to prevent the common phenomenon of heat escaping through the roof. As insulating the attic tends to be easy, at least compared with doing so elsewhere, there's no good reason to hesitate. You may even be able to handle the job yourself. The benefits are twofold: In the short term, you can expect a more comfortable indoor temperature, and in the long run, you can look forward to lower monthly bills. It's a no-brainer!