Resource Superlist For Twitter Folks →
@johnhaydon has assembled an excellent compilation of Twitter resources in response to hundreds of questions he has received on how to use Twitter. You’ll see several categories below, and a free download at the bottom of the page.
Video Tutorials
How to use the Seesmic Twitter application (3 videos)
Video Tutorial: The Seesmic Web-Based Twitter Application
Video Tutorial: Overview Of The Latest Version Of TweetDeck
Free social media video tutorials on iTunes 
For Beginners
10 Easy Steps for Twitter Beginners
13 Twitter Tips and Tutorials for Beginners
Do-It-Yourself Twitter Background
Think like a Toddler and find your Voice on Twitter
Ten People All Twitter Beginners Should be Following
How To Avoid Being An Ass On Twitter (and every other social networking site too)
The Twitter Post Types: When And How To Use Them
The Top 5 Mistakes Internet Marketers Make on Twitter
Social Media Tools 101 (From Blogs to Wikis)
Exploring Social Media: Start With the Basics
Building Your Relationships
Guest Post on Darren Rowse’s TwiTip.com
Measuring Your Twitter Network’s Health
Tweet Your Message to a Larger Audience with Hashtags
How To Get The Universe To Promote You On Twitter
6 Ways to Maximize the Use of Your 140 Characters
What If Shel Silverstein Used Twitter?
A Secret to Writing Posts that Go Viral on Twitter
The Superlist List
Social Media Metrics Superlist
Social Media Case Studies Superlist
How-To: Search the Social Web - Ultimate Toolkit
Mentor Twitter Users
(assembled by @paddydonnelly)
How Do You Twitter: Chris Brogan?
How do you Twitter: ProBlogger?
How Do You Twitter: Guy Kawasaki?
How do you Twitter: Daily Blonde?
How do you Twitter: Andy Beal?
How Do You Twitter: Mayhem Studios?
Don’t Let Your Marriage Go To Shit
How To Use Twitter To Tweak Your Relationships At Home
Great Tools For Twitter Users
Manage Your Messages on Dozens of Social Networking Services at Once with Ping.fm
How To Be Useful On Twitter Without Going Crazy
Combining Broadcaster And Connector Twitter Accounts
Grow Your Blog Readership with Twitter High and TweetLater
Blip.fm: Connecting With New Tweeple Through Music
TwitterFriends - A Useful Twitter Metrics Tool
Measuring Your Twitter Network’s Health
TwellowHood - Find Local Twitter Users
Catch Your Twitter Quitters with Qwitter
Great products that I’ve found useful:
Blogger’s Bible Fast Track by Caroline Middlebrook
The Secret To Writing A Successful and OutStanding Blog by Liz Strauss
WordPress SEO Secrets by Michael Martine
Authority Blogger by Chris Garrett
And finally, a resource that many folks have found useful (and not just non-profits):
via JohnHaydon.com
