I've been growing tired of the setup in our master bedroom. Just like cleaning out your closet is a more frugal alternative to going shopping; rearranging a room is always a first step before new paint or new bedding.
Originally, I had the bed flat against the wall with a nightstand on one side and a chair on the the other.
By moving the bed so that it was in the corner and removing the chair (that we never used) I feel like the whole room opened up. The picture below is from the same location as the one above but just look at all the extra floor space now. The room looks so much bigger!
So, before painting your walls or buying new curtains, try to move the furniture around a bit. It might surprise you how much of a difference it makes.