One way to increase your site's google page rank is to acquire links to your site. One of the most common ways on how this is done is by leaving comments on other sites. Here's what you should do:
1. Search google for sites with high page ranks using the keywords for your site.
2. Read interesting articles on that site. If the site has a "popular articles" section, start on those articles.
3. Leave a comment on that site. Don't forget to write the URL of your site in the "site" or "url" field.
It's as simple as that. You have successfully promoted your blog over the internet. If you continue with your internet marketing efforts, your blog will surely acquire a high page rank in no time.
I would like to end with a simple reminder about leaving comments. When you leave a comment, always be sincere. Avoid leaving comments with generic messages like "Nice post", "Loved the article", and all those unsincere comments. The site's administrator will know and its likely that your comment would only be deleted. And when that happens, your link will disappear and all your efforts will be wasted. Like in real space, as opposed to cyber space, internet marketing has to be ethical as well.