I'm not quite sure what you are asking. Following your favorite blogs by others is easy, if that's what you meant. There's usually a box to click near the Comments in order to subscribe. If you want to promote that other blog, write a post about what you enjoy in it.
The same advice applies to promoting your OWN blog. Take a look at how others are promoting theirs in this Showcase Forum. You will get ideas of what to do. A good promo for a blog tells you what kind of audience it is aimed at, and what form of content it contains, and it's short, like any other commercial.
Best of luck to you. Your blog is already very pretty, and will be much better when you add more written material.