Video, audio, and other resources related to the Holocaust, Darfur, and other atrocities. These resources are created or linked to by Facing History and Ourselves, a non-profit genocide education organization.
Colin Purrington's site on designing academic posters offers a wealth of advice and instruction on creating an effective, interesting, and attractive academic poster. Don't be thrown off by the title - Colin's advice applies outside the sciences.
Swarthmore offers access to Lynda.com, a site with high-quality video tutorials on a range of digital skills and projects. Lynda is an excellent resource when you have a specific question about (e.g.) InDesign or other software. Try searching for the issue you're encountering, and in many cases, you'll find a short video clip addressing that specific problem.