Twitter Plugins
Most popular blogs are integrated in some way with the author's Twitter account. Establishing links between all of your online platforms is crucial to building your online presence. Your blog readers can become your followers, and vice versa.
There are several different plugins / widgets to choose from;
TweetMeme Button - Allows your blog posts to be retweeted with the click of a button.
Twitter Tools - Integrates your blog and Twitter account, allowing you to easily put tweets on your blog and blog links in your tweets, all from the Wordpress control panel.
Twitter Feed - Automatically post your blog updates on your Twitter account.
Twitter Counter - Places a counter on your blog stating (bragging about) the number of followers you have.
WP to Twitter - Posts a Twitter update when you update your WordPress blog or post to your blogroll, using your chosen URL shortening service.
Twitter Tools
TweetDeck - Twitter desktop client that allows you to tweet remotely, keep track your followers, direct messages, replies, etc. It supports multiple Twitter accounts and is an awesome tool to have. You can keep track of Twitter without having to constantly visit the Twitter website.
Twitpic - Share your pictures and photographs on Twitter.
Twitbin - Firefox plugin that allows you to monitor your Twitter conversations from a sidebar in your browser. A great way to multi-task and keep an eye on your Twitter account while you're busy doing other things.
GroupTweet - Lets you send a tweet to only a select group of people.
Hootsuite - The leading social media dashboard to manage and measure your social networks.
Twitter Services
Twilert - Sign up for email alerts whenever someone tweets about a particular keyword or mentions your name/product.
Qwitter - Sign up for email alerts when someone stops following you.
This is only a short list of what is currently online, it is impossible to keep up with the amount of plugins, tools and services that are available.
Some are free, while othes are 'paid for'.
Great tutorials buddy! What I would suggest though is that you label your pages appropriately as this will make them searchable and make your training much easier to navigate based on "concept". Just a small update will offer a radical improvement for those going through your training.
Nice work!