There are some good ways to build blog traffic. Paid advertising (adwords, adtoll and etc) free advertising, viral marketing, search engine marketing, RSS/XML feeds, and word-of-mouth. You should always use your blog URL address in the signature of your email, forum discussions,  and etc.

Submit your blog URL address to search engines and blog directories.

Submit your RSS/XML URL feed to blog ping services like Technorati, Ping-O-Matic, and Blogdigger (service to update different search engines that your blog has updated).

Submit a good article to GoArticles.com,  ArticleCity.com and etc. Once submitted your articles can be picked up and published by other websites. The trick is to make sure you include your Blog URL address in the "About the Author" passage. What this does is create link popularity and backlinks for your blog, when someone picks up your article from the syndication then publish the article on their website the "About the Author" passage is included with each publication and the link you included is followed, crawled, and indexed by search engines. Imagine if your article is popular enough or controversial enough to produce 10,000 publications across the web. The search engines is bound to find your site in no time with that many publications and credit you a authority on the topic, in return increasing your rank on search engines. The small effort of writing a well written article is rewarding. You should try to write at least 1 full length article every week for syndication and submit your article to at least 10 article syndicators.

Use multiple blogging accounts to attract more vistors. This means you should have a blog with JournalHome.com, Blogger.com, LiveJournal.com, Blog-City.com, tBlogs.com, etc. The more blog accounts the better. You can copy/paste from 1 blog to all others. Having different blog accounts is like having a publication in different newspapers. This enables you to attract more visitors and this also increases the chance that 1 of your blogs will be in the search engine results for your focused keywords.