Interact With Other Blogs
Anyone who runs a blog that receives any traffic at all will come across comments. Many are spam, only a few add real value, and even fewer are truly fascinating and remarkable. Often times, you will come across internet trolls who tear apart blog posts just for the heck of it. If you can be in this final category consistently, in ways that make a blogger sit up and think “man, I wish that person commented here more often!” you can achieve great things for your own site’s visibility through participation in the comments of other blogs.
Do be conscious of the name you use when commenting and the URL(s) you point back to. Consistency really does matter, especially on naming, and linking to internal pages or using a name that’s clearly made for keyword-spamming rather than true conversation will kill your efforts before they begin.