Audrey Hepburn, Breakfast at Tiffany's Window Scene $79.95 houzz (houzz.com)
One of the easiest ways to give your walls an instant makeover is to hang some of your favorite posters. It doesn't matter if it's Batman or the solar system as long as it's something you like. However, to make sure the posters look more geek chic than dorm room is to frame them. This will make them stand out more. This is also great for those who are renting and are unable to make any paint changes.
You can find affordable frames and posters at many of the big box and discount stores. This is a very easy project to do.
But if you're not a DIY sort of person there are many stores (including online) you can purchase framed posters from.
Audrey Hepburn, Breakfast at Tiffany's - Pink Framed $79.95 houzz (houzz.com)