From what I've learned, that is a good approach. Doesn't necessarily have to be structured as a blog with chronological entries, could look more like a traditional website.<p>An example: let's say you have a time tracking web app. Your content can talk about good approaches to time management, or techniques to focus, or publish research about the average lengths of different tasks from the data that you can gather from your  users.<p>A great example is Mint.com's blog -- <a href="http://www.mint.com/blog/" rel="nofollow">http://www.mint.com/blog/</a>