I've just gotten permission from my publisher to release a chapter for free from my new book How to Wow with PowerPoint. This is the intro to the book and focusses on best practices for designing graphics for the screen (so even if you aren't a PowerPoint fan, you'll find some wholesome goodness on here).
I hope you all enjoy it, you can download direct or visit the resources page. If you'd like to order the book (it ships in a few weeks) click here.