When I am moderately bored, I play online video games. And one of my favorite sites for mind-wasting video games is Kontraband. Kontraband also has stupid mind-wasting videos and mind-wasting pictures, many of which are rude. It's basically the website you want to turn to when you want your brains to turn to mush and you don't have any good drugs handy.
I used to play this tetris-like game for hours at a time. I thought it would be fun to try to embed it here. If it doesn't work, I can always delete the post.
Hints to playing: The space bar rotates the pieces. You're trying to rack up points by connecting top to bottom or right to left. The corner tabs have to meet before the bonus runs out.