Ask HN: What's your startup's blogging strategy?

I want to start writing a blog for the startup I’m working on, but I’m not sure how to approach it. For example, say I spend a week implementing a new feature. When I’m done, should I write an article announcing it with screenshots and use cases? Or should I write a technical article explaining how it was built? Or both? On that note, if I’m writing a tutorial for my product, should I post it on the blog and link to it from the support section of my site, or should I write it on the support section and link to it from my site? And there’s more: should I try to position myself as a thought-leader in the spacing I’m working in (mockups/design/ux), by writing high level articles on the subject? And as a sole founder working on this part time, I could write a lot about that too, but I’m not sure how interesting people using my app would find it. There’s a lot of options. If the answer is "all of the above" is there a balance I should strive for? I feel like constant "I added feature X" updates get old after a while and don’t contribute to building a community. If I’m going to write I’d like to get the most value out of it, but I’m not sure how. Any suggestions?