Choose your niche. Don't write "everything for everyone". Choose your topic. Choose your audience. Its always frustrating to see a "photos from my recent trip to the country" post on a blog from a marketing guru. Unless the author is a celebrity.

Link to your own posts. This is great for new readers to see what your blog is about.

Tag your posts via Delicious. It's easy to add a button "add to delicious" into any modern browser.

Have a "recent posts" list. Having a "most popular posts" list is also a good idea.

Link to other blogs. Bloggers are crazy about their stats. They will find your link via http-referers and check your blog. And even link you back in some cases.

Post interviews. Find an authoritative person in your niche and ask him for an interview.

Add a copyright footer to your RSS feed with a link to your blog. Let your RSS feed produce links for you.

Post updates to Twitter.