you only need to establish a few rules that will be applied sitewide:

* Use an interesting title - Also known as linkbaiting - your title should captivate the user to read more
* Try to use your blog keywords in the title - while it may be hard to always do this, by keeping the title related to the topic, your blog will always be relevant
* Use the H1 tags - All blog editors allow for custom templates, so be sure to stylize your blog title in the H1 tags
* Link to other blogs - Find other related blogs that your readers might find interesting, and ask for a link in return
* Don't forget about your archives - You may post a topic that isn't hot at the moment, but comes up later - make sure your readers can find that posting

As stated above, the key to a successful blog is frequent postings. You don't need to write up an article everytime, two paragraphs and maybe some resource links is what a typical posting should be comprised of.

Regards
SEO Master