They make stickers out of vinyl so you can easily remove them. Their search engine sucks so you kinda have to CSS it if you want to find what you want. You can also upload your own images and have them print them out. I've also put in a personal request for a specific sticker that didn't exist and someone made it for me.(just pm an artist that you like.)
My overly-decorated laptop is under construction but you can have almost anything you want through that site.
