I'll assume by now everyone has heard of idsketching.com. If not, here is a really good demo by Spencer Nugent on laying out and creating exciting concept pages.
If you have time to take a glance, do it. Here are a few questions to keep in mind while watching:
1. How are text, call outs, and motion details used?
2. How is depth achieved?
3. Does creating a thumbnail sketch of a concept page seem useful?
IDSKETCHING.COM : Cell Phone from Industrial Design Sketching on Vimeo.