If you want a distraction from your day, and you want to benefit from it as well, then you should try Word Dynamo. This great little site is part of the Dictionary.com site. Word Dynamo produces several different formats of word games. Then you get graded. The games range from dead easy to prep words for LSAT and other post graduate tests. It is fun, builds up your vocabulary, and it is free. Now that's a winner in my book!
Go to http://dynamo.dictionary.com and have fun!!!