If you have some free time and you like words, try some of these interesting word game sites!
Merriam-Webster's Word Games: Search, drop, roundup, ruffle, rip, and jumble words in a plethora of games here.
Word Game World: Classics such as anagrams, mad libs, and crosswords mix it up with buzzwords, triangulars, and ZigZags.
Mobile Device Word Game App: Bumperstickers. On your phone. In a game.
English Vocab Word Games: Simple games that can either strengthen your vocab, pass the time, or if you're lucky, both!
Fun With Words: As a sampling, this site has boggle, hangman, and tongue twisters.