Blog or Web log is flexible way of publishing content online over time. There are no rules because content has to be updated. If it’s not dynamic, you’re hosting a static website on a blog network/interface. That can be isolating. Not just post topics (also known as the “what I had for breakfast today” blogs).
So blogging is building a network (which informs content) and filtering it (by publishing opinions).
Since this is pretty meta, here’s what I mean. Picture from a user on my Twitter feed:
A blog is not a model for publishing. So, there’s no rules for blogging. They really have to start with the source blogger. Update if there’s a problem. Make a content change. Take a break from topic changes. Change format: post lists or feature other entries. Once the blog is back on track (see diagram), focus on writing again. If there’s not a model out there for what you want to do, leave it open-ended.