Tubetorial has some screencasts that cover the 7 Essential WordPress Hacks.
This series highlights 7 of the most important tweaks and plugins that any WordPress user should know about:
- Episode 1: How to Get More Search Engine Traffic With One Simple Tweak
- Episode 2: How to Make More Money With AdSense
- Episode 3: Feedvertising: Make Money With Your RSS Feed
- Episode 4: More Feedback, Less Spam: WordPress Contact Form Plugin
- Episode 5: How to Increase Comments and Page Views With One Quick and Easy Plugin
- Episode 6: How to Stop Comment Spam in its Tracks With Akismet (forthcoming)
- Episode 7: Back Up Your Blog or Risk Losing it All (forthcoming)
I guess these are “essential” if you care about making money with your blog.