Don't Hang Art So High
Framed pictures, artwork, posters, and everything of the like are extremely important things to have in your house if you don't want to seem like a serial killer. By hanging up artwork, you show people that you're cultured, you understand what it's like to enjoy the finer things. However, not all hanging pieces are considered equal, and HOW you hang things is arguably just as important as WHAT you hang...
Make Sure You Know This
It's always best to hang artwork at eye-level. Have you ever gone into an art gallery and saw that the artwork was hung all the way up at the ceiling? No, of course you haven't. A good rule of thumb is to make sure that you're hanging artwork no more than 60 inches from the floor, depending on your ceiling height.