Is the light switch too tough for you to operate, too hard to find in the dark, or too small? If you answered yes, you are a sad person.
On/Off Paint allows you to paint a section of your wall and then connect it to an electronic switch for controlling lighting and such. You can be as creative as you like with this stuff, painting an entire wall or an obscure part of a larger mural.
You can read more about his French invention/company APCI here.