I liked this article for the discussion that the author presents about where, when, and what to post. This is something important to work out for yourself when you start blogging primarily in your own space. As for when to blog, I like the advice from Ron Chester:

The best time to blog is when you have something to say. If you have something to say, the writing will be easy. For me, these things usually come from a personal experience, anything from a simple observation to a full-blown epiphany. Write about it in the moment, if you can.