I go back and forth with prefixing my own blog posts - especially the softer ones, like this one on preserving technical knowledge http://thomasleecopeland.com/2014/10/01/preserving-technical... - with disclaimers like "I think" and "from what I've seen", and so forth. Saying "I think" in a blog post that I wrote feels redundant; of course I think this otherwise I wouldn't have written it. But more frequently it's an accurate reflection of how I feel about a topic. In the post above, I'm not making a dogmatic statement that "diagrams are bad", but I'm saying that face to face interviews have been more effective for me.
That is hard, but you can be more specific: "In my experience," "I'm confident that", "sometimes it seems", "it is an absolute law that", "there are some circumstances where", "it's hard to balance these considerations, but I...", "I will fight you and your entire family if you disagree".
