100 Things Every Designer Needs to Know About People is a list of all the bits of psychology that they should be teaching in design school. It’s neatly organized, easy to refer to, and easily the best $30 I’ve spent on books in the last few years. If you’re even remotely interested in improving the effectiveness of your designs through an understanding of cognition, this is a great place to start.
Type is everywhere. Duh. If you don’t know that, you’re not paying attention. But, ever since a little film called Helvetica it seems like people can’t miss the opportunity to bring it up. PBS Arts piles on with a very sweet, if not terribly insightful, mini-doc. At least it’s short. Maybe you can get your clients to watch it.