I have the same problem. My blog is a rather personal blog where I post about my life, foreign language studies, my filmmaking philosophy, life, etc. There is no focus, it's more like a personal journal or diary. So I'm not exactly sure if or what kind of value I provide to people out there.
Nevertheless, I'll keep up my blogging activities. Just like Shaden said, blogging for me is a means of self expression. When I shoot films I regard myself as an artist, I want to be able to say the same thing about blogging.