I had a couple meters of RGB LED strips leftover from the cabinet lighting on the Beast, so I decided to put some of it to use. I've been wanting floor lights in my Tundra for a few years, and this was the perfect excuse to make some.
Under the glove box off:

Under the glove box on:

Switch with headlights off:

Switch with headlights on:

View from the back seat with floor lights off:

View from the back seat with floor lights on:

View from outside driver's door:

Really impressed with how these turned out. They're hard wired for red only right now, but I can make short (about 1" long) harnesses to put between the strip connector and harness connector to light them up one of 7 colors. Had to buy the switch and Add-A-Circuit fuse for a total of about $17 and a couple hours for this little project.
What do you do (non arcade related) with your spare parts?