How can I make a room look gothic?

Paint the walls. One of the easiest ways to pull off one of the biggest effects is to paint the walls. Don't fall into the stereotyped trap and immediately buy fifty cans of black paint. Take some time to decide what kind of color you would like. You could also create a mural, and make a feature wall. Some suggestions for colors would be silver, deep purple, black, or maybe even a royal red or blue.