Every time I write new content I post it to twitter. If you use the right keywords and make your tweet interesting enough you can get a lot of clickthroughs just from people searching.
For example if I write an article about SEO and Google I can tag the end of the tweet with #SEO #Google and anyone that searches for those keywords on Twitter can see my tweet about the post that I wrote. Be sure to write creative headlines for your posts so people feel the urge to click on them.