I feel people learn applications on the web by trying and playing with it, for instance, Twitter, Blogging, customising a widget and so on. However, FAQs, the provider’s Help or tutorials will tell you some tips so that you don’t need to search a lot.
Here is an example, the Twitter For Beginners ebook is designed for anyone who is thinking about using Twitter, or anyone who has jumped into the Twitter swimming pool but isn’t happy with their Twitter experience.
After read this book, I had a thinking of my twitter goal, very simple, digging more useful information for my particular interesting, such as learning technologies, social networking, learning repositories. Meanwhile, I learned the free URL shortening services: http://bit.ly and http://tinyurl.com.
You also can get your own copy of Getting Started With Social Media ebook, which is designed for anyone who is thinking about using social media for business, or anyone who has jumped into the social media swimming pool but isn’t happy with their experience or results.