Okay. I am not intentionally trying to make anyone be less productive, but if you're going to procrastinate, you might as well build vocabulary skills, right? If I'm having a bad bout of writer's block, or need to warm up before settling in to meet a deadline, I might play one of these word games for awhile.
Scrabulous - Play Scrabble online against other players, yourself, or a robot. Try "blitz" mode for practice against real people without losing permanent points.
SandScript - This is a crossword puzzle-like game without the irritating grid.
Text Twist - See how many words you can make out of one set of letters.
Bookworm - This challenging game becomes more satisfying the better you get at playing it.
Enjoy . . . but don't enjoy too much!