Blogging for SEO purposes

If you want to start become a blogger, what purpose are you up to? Is it you wanna do this just for fun? Or is it that you want to make improvements and developments for your site? We'll the thing is, for me it actually both I want. I want to post anything just for fun, at the same time, using SEO for promoting and increasing backlinks for my site. Without using SEO while having fun writing your own blogs in different blog portals like Blogger, WordPress, Drupal, Joomla and many more, your blog could be useless and cannot generate traffic to unique visitors. There are lots of ways doing that by just simply submit it to search engine directories, web directories, social bookmarks and many more. Blog is nothing without SEO.