Some people suggest adding keywords to a website’s comment tags will increase their prominence. Keep your focus where it belongs, on your content. http://fruytio.com/story.php?id=264597
Captions are a tremendous SEO tool. That means that photos or newspaper articles linked to your site should be taken advantage of, since the captions are often rich in keywords.
Search engines use bots which constantly search for new and updated content. Adding new content on a daily basis will invite these bots to take a look at your site. Furthermore, truly good-quality content will often be passed around. After that, those who shared your articles will return to read more, as will many of their friends.