Those blogging "rules" are all aimed at aspiring professionals. They tell you that if you want to attract advertisers, you have to knuckle down and make a lot of effort. You can't get away with sporadic publication schedules, meandering blog posts and poorly lit images. And that's largely true.
But if, on the other hand, you're blogging for the fun of it, you're free. If you're in this for the joy of writing or the warmth of the blog community, you can ditch the rules and focus on having some fun.
Specifically, you can consider scrapping all of the following advice: