Commentary on top 10 blog usability mistakes - mixing topics

Mixing different topic in one blog is the eighth mistake in the top 10 blog usability mistakes by Jakob Nielsen (2005). One easy way to confuse your readers is to write posts from various topics into same blog. If the users don't know whether your blog is about political satire or family dilemmas, they have to live in permanent uncertainty not knowing which topic will the next post be about. Or more likely they just move along and find a blog that actually can stick to one topic and not meander aimlessly over all possible topics and then some more. In case you really have burning desire to blog about more than one issue, by all means make multiple separate blogs each with their own distinct topic. How this mistake is connected to usability may not be apparent at first, but letting your users know what they can expect is a good usability practice in general.