Summer is all about brightness and you can bet on bright colors to add a cheery air to your home. The good news is that it's not very difficult to change the living room decor to bring in the summer feel because all you need to do is change the cushion covers. Complement this with a bunch of matching flowers and you have a winner of a living room on your hand! Throw in a table runner with a bright intricate pattern to give your dining room a summer make-over. Your bedroom could also do with some spunk, and the best bet is a bright-colored bed spread. These small changes can do wonders to your interiors without too much of an effort or expense.