I keep mine similar to Bill's- Tupperware container, few inches of soil/coco-fiber, misted (when I get to it), usually pretty damp. I keep it in my cellar, in the darkest room where it generally stays in the 50's or lower F most of the year.
I've been bad and really neglected mine, due to not really needing the white-worms recently. They may have all died off, but I tried the dried cat food dampened with milk yesterday. I'll let you all know how it goes.