I find maintaining a blog is a very rewarding task. People know where to find your stuff and in time will return regularly, especially when you post frequently. My blog gets about 4-5000 hits a months based on an average of 2 posts per month. I promote it posting links to the large wargames fora. I do take care to inform people what the blogpost is about and what they can expect. I dislike simply posting links without context myself so I try not to do that.
People tell me my reviews, reports and games entertain and inspire them and that was the main reason for starting a blog (and the same reason I do participation games).
You should try it. It is easy. I built mine with Blogspot but I have heard good things about Wordpress. It is not hard. When you find it takes up too much time and causes too much stress, you can stop.