Sean Z P Harris at 2011-12-05 10:45:15:

Perhaps the phrase should be, “Twist what you know into something exciting and new.”

Jared Kelly at 2011-12-05 11:49:56:

Yep, less "write what you know" and more "know what you write".

Annika at 2011-12-05 14:34:01:

I break it down this way: write what you know to be true psychologically and emotionally, not factually.