Most of my website is my personal documentation. I write on my blog because I want to save something or archiving stuff.

I don't write for anyone, or because I think I'm an interesting person. If it help someone, good, but the main purpose is to help myself. I don't really write a lot and I don't think I should write on regular basis. I just write when I need it.

Of course you might not feel the need of doing that, but having that tool helped me a lot personnaly and professionnaly.