When you have build your web-site or blog, the big question is 'how do you drive traffic to your site/blog?'.
These are the few things you can do :-

1. Post regularly- do short posts if necessary to get it updated.

2. Include rich keywords related to your topic.

3. Post blog RSS feed at sites which is related your topic.

4. Also submit your RSS to Google Reader, so Google Blog search picks up & indexes your site/blog.

5. Submit your blog to popular search engine such as Google, MSN, Yahoo, etc.

6. Leave comments on other sites/blogs related to your topic.

7. Put links in your email signature as well as in forum post.

8. You can also do it of-line by handing out flyers, business cards or even put stickers on your car.