Came across an interesting site that allows people to share and learn information -eHOW.
"Every month, over 26 million people visit our site. We have more than 300,000 articles that are professionally written with clear and concise directions on how to do things. We also have a rapidly growing library of articles created by eHow's members.
We love sharing our knowledge with the world and have created a platform for you to share your knowledge with others. We invite you to become an eHow member, where you'll be able to comment on articles and interact with other members through a robust set of social networking tools. You can even write your own How To articles with our easy-to-use publishing tools that let you express your knowledge through text, images, and video."
Here's an interesting example: http://www.ehow.com/how_2052703_write-professional-external-email-memo.html
