Put that wallpaper on your light switch.

Wallpaper is expensive, and despite my best efforts, very few people want to come to my wallpaper-this-room-with-me parties. Many companies will let you get a sample of their very expensive wallpapers for just the price of shipping or even for free (Check out Wallpaper Direct for the free-free stuff). Then all you need is your old plastic light switch cover, scissors, some tape or Mod Podge, and about 8 minutes of your one, precious life. You could really use any paper you want for this. I've done it with prints from old calendars and art books. Get yourself free of that old yellowing light switch cover and buy nothing in the process!