Do you think blog commenting is a good way to promote a blog ?

Do you think blog commenting is a good way to promote a blog?

There are many ways to promote a blog for more traffic on it .
I think blog commenting is a good way to promote a blog .
Find high PR pages on the various blogs that allow commenting and comment on those pages, including your link and anchor-text. After comment is approved then it provides your site with a strong back link. It is one of the best link building methods that provides both high PRas well as high search engine rankings by creating quality back links to your site.

Here are 3 of the advantages to taking your time to comment on blogs.
• Back link to your site
• Direct traffic to your site
• Exposure to your audience..

• you expand your knowledge (you have to read posts before commenting!)
• You drive traffic back to your own blog
• you get backlinks
• you get more comments (bloggers will visit your blog and comment back)
• You build relationships