Here's what I think: there is no "top ten" things that will guarantee a successful blog. It's mostly about the content, but every blog is different, and will attract a community of followers (or not) based on a number of hard-to-quantify attributes. I would just say, be yourself, and write about interesting things.

Oh and if you think I'm going to follow, friend, like, or recommend a blog that mostly about hawking a product, you're in dreamland.