"Your theme could be anything that reflects your character, such as your favorite sport, artistic style (minimalism, Art Nouveau, etc), or color. If you are inspired by fairies and angels, you can order affordable and inspirational wall décor from companies like Quintessence Creations to transform your personal space.

Use home décor accents

Adding inspirational wall decorations to bare walls is an affordable way of beautifying and personalizing your bedroom. Wall décor adorned with fairies, angels, powerful gods and goddesses, or elements that can be found in nature can inspire and comfort."
http://blog.quintessencecreations.com/2014/01/use-inspirational-wall-decorations-accents-to-personalize-bedrooms/