Blogs can provide valuable information. I personally have found that little piece of information that helped me solve my problem on a blog post. My RSS reader is full of other peoples blogs.
This blog is where I can post solutions to problems I've solved, discuss my musings and general randomness.
If someone gets something useful out it, that's great. I'm glad that I could help. Chances are I got helped by your blog.
Onwards and upwards.