Loic puts it very well, why blogging is so benefitial:

"I am not such an egocentric as you are, Loic ;=). Why would I write anything about myself, what I feel, what I learned, what I do ? Because you cannot expect to get rich contributions and ideas from others than can only happen with blogs if you do no start sharing someting with them.

No way, I have no time for that. I already take so much time answering email. Honestly, did you think you would take that much time reading and answering email ten years ago ? Well think about blogging as emailing to your whole network and to anybody interested in anything you say. Most business conversations are not confidential, a small portion of it only is really confidential. Then blog some of what is not confidential and you will see your network will start reading it and you will get a lot of new interesting contacts out of it.

You will be surprised, just a month after having started your blog, how many people of your network read it. You will also be surprised how many searches from Google and other search engines lead to things you have said. You still do not care ? OK wait a minute."

I fully agree with him....