People blog for all manner of reasons. Some have something important to say and what they say is useful to others. Others have nothing important to say. And what they say is useful to nobody. The web is full of writing, good, bad and indifferent. If you own a blog or are looking to start one, finding a worthwhile reason to write consistently, with a goal in mind, however broad or narrow it may be, should be at the epicentre of it all.