I’ve been involved with blogs for 2nd year now. I must say, from the start rush on, regular updating determines a good blogger.
Having a domain of your own is a plus, although I don’t know if you host it on Wordpress.com or you have your own server. If the latter is the case, another plus. That way, you can modify your themes and a unique theme is a very important (if not the most) thing the visitor firsts notices and that way memorizes your blog. I’ve discovered that people tend to read more blogs that are bright, not dark.
If yours is a personal blog, not much can be done to improve your position No. on Google, Yahoo, etc. You can write juicy titles, that are in a way deceptive (ie, has more meanings). I tend to start every article with a picture. For instance, my last post was about new computer. I pasted Intel logo in the first place, so it was very obvious the post is a: about computer, b: a computer that runs on Intel. That’s two pieces of information, hidden in a couple of kilobytes, measured in a couple of pixels, but is perceived in the blick of an eye.
If you have the option, install the All In One SEO, which will give you the option to add meta description and meta title, which will give you better position on Google.
What’s concerning your content is, more or less, up to you. Follow style guidelines, for instance to create an optimal number of paragraphs proportional to the whole content. Some may be shorter, some longer, but do not push to extremes (have a paragraph containing 2 sentences, an yet another one that would fit a whole sheet of paper).
You can also add some photos in between the paragraphs, but be sure to give them alt attribute. Another option is to place a photo in a paragraph. That would push the content to the right (or left, depens how you want it) and would look like the text is a more extensive description acompanying the picture.
YouTube videos are a plus, too.
Don’t be afraid to try and experiment. If it works, way to go. If it doesn’t, hell, at least you tried.