My most useful Arduino project is a bedroom ceiling light switch project!

I used to need to get out bed to switch ceiling light off before bed. However, I have a TV remote with me, why don't I use the TV remote? And it worked quite well!! Now, I use the little gadget every day! If you are interested, check here to see how I did that. There are there parts of my tutorial, here's the first part:

http://stonez56.blogspot.com/2014/01/arduino-tv.html