There is no shortage in the world of people and their respective websites that tell you how to do something. A few months ago I found a site that is actually created by Barnes and Noble, Quamut. I've been poking around on it. Very well-written, very dense, and the number of topics is incredibly broad.
The New York Times did a piece on Quamut with some interesting insights. I won't steal their thunder and will just provide the link: http://www.nytimes.com/2008/04/28/technology/28ecom.html?_r=2&scp=1&sq=quamut&st=nyt&oref=slogin&oref=slogin. Instead, I want to focus on the generosity of these sites. In an effort to virtually "strut their stuff", experts are on-line writing out more how-to manuals than ever before. All for free. If you want to learn to play the guitar, fix a toaster, or hike the Appalachian Trail, someone (and likely many people) want to give you instructions, tips, tricks of the trade, and their experience.
Who says the world is a selfish place? Check out http://Quamut.com/