Tip #10: Biamp your speakers.
If you've purchased a home theater receiver in the last couple of years, it may have extra channels of amplifier power that you can put to use for better sound. That's because most newer receivers have seven amplifier channels, while many people only use five speakers in their home theater setup.

If your speakers have two sets of terminals, then with the right kind of receiver you can probably improve your system's sound by biamping.

If your receiver's "surround back" channels are going unused, check if you can redirect the power to biamp your front left and right speakers. This neat trick gives you four dedicated amplifier channels to drive your front two speakers, essentially doubling the available power for more dynamic, higher-quality sound. Check out Dave's post on biamping your speakers for more info.

This post is based on the article "15 Tips for Better Sound from your Home System" by the Crutchfield Writing Team.