As you trudge through the last few hours of the week, consider easing your boredom with Knoword, a fun game that tests and improves your vocabulary through a definition-based game.
Knoword is remarkably enjoyable; it gives you dictionary definitions and the first letter of a word and you have to guess the word within a specific time period to continue. After missing a few, you have to start over. It sounds more difficult than it really is — you might be surprised at how quickly some words come to your mind after reading their dictionary definitions. It's still a good challenge, though, and it's incredibly addictive. It's not exactly going to help your productivity, of course, but you can always ease your conscience by telling yourself it's educational. Hit the link to check it out.