Share knowledge be bold, you know that you know many things around you. And you may want share and then a devilish thoughts of personal benefit comes to mind; how about running a blog and monetizing?
But then you realize that the knowledge you have where gathered from the surroundings without any recalcitrance, you would admit that you weren’t born with all the knowledge you have. Then there are some secrets never to be leaked. Keep it with you. What about other things. You may be living in a place and there are absolutely no data about your place on the net. Why not write a wikipedia article, or simpler why not update things and happenings around you.
Editing wikipedia can be a good hobby. From spelling mistakes, grammatical or sentence construstion to outright new data to be shared. Throw away the cigarettes and beer bottles, start writing, editing, updating. Be bold.
Sometimes wikipedia editing is better than putting the data in blog.
If you think you can bog data the think about this