Toss in five new words. By new words I mean words that you would not typically use otherwise. You can open to random pages in the dictionary, look at a few word-of-the-day lists, or break out the thesaurus. Expand your vocabulary or make your character sound pretentious.
Get your list of words. Find thirty minutes to write. Then challenge yourself to write using those words in that time frame. Make sure that it remotely makes sense.
But more importantly, have fun!