A diet for your mind

It's Groundhog Day, which means that January is over. January, of course, is official diet book month, the time of year that formerly young, formerly thin people buy books in the hopes that by osmosis, they will magically become post-holiday skinny.

Now that this madness is over, perhaps it's time to invest in something you can change: the way you think. Here are a bunch of books, ebooks and recordings that can help with that: Diet books for the mind.

Controlling what you eat is an interesting challenge, but not nearly as important as controlling how you think.