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Add a splash of color to your medicine cabinet with peel-and-stick wallpaper.
Stencil your favorite Beyoncé quote on your shower curtain.
All you need is paint and a computer printer. And a curtain, of course. Here's the full tutorial.
Glue together two cheap bath mats to make a pineapple-shaped place to warm your toes.
The tutorial could also work for any shape you like — it doesn't have to be a pineapple.