How do I make my small room bigger?

I have a tiny bedroom with a double bed, wardrobe , dressing table, book shelf, 2 bedside cupboards, 1 tv cupboard, 1 cd cupboard, and 2 dvd cuboards. I want to make the room look bigger and I dont want to paint the walls at all, and I just want my furniture looking tidy and not out of place. Would a single bed do and should I get rid of 1 of my bed side cupboards?