I've written quite a few handouts over the years about basic storyboarding stuff like composition, using values and simple layout tricks. Here are a couple more pages, full of the kind of basics that seem too obvious and simple to bother with but that can make the difference between a drawing that works and one that doesn't. I sure wish someone would have told me this stuff when I was at CalArts, anyway, it would've saved me years of crummy drawings...
This last page is from Andrew Loomis's "Creative Illustration" and they're about how different kind of shapes give different kinds of different emotional feelings. They can be really useful when boarding to help give your drawings the right kind of feeling for whatever type of scene you're boarding.