Here’s a quick checklist of tips on improving site traffic (in no particular order):

Submit URLs to search engines and web directories to start the ranking process: Technorati, Google, Alexa, DMOZ.
A good domain name and targeted meta tags can help improve search engine rankings. Keep your tags relevant to your data.
Check your site validation from time [...]

There are free resources and then there are free resources for submitting your articles, but it makes sense to submit posts to websites with ranking equal or higher than yours.
Here is a list of websites with a page rank of 6 or higher where you can submit [...]