Amazines is another free article submission site that can help with traffic and link building towards your niche website. You can sign up for a free Amazines account and start submitting articles immediately.
More on Amazines
Again, you want to be sure that your content is unique and provides useful information. The goal is to build trust with visitors that read your articles so that they will want to click on your links, not spam the Internet.
The cool thing about Amazines is that when your article is approved, it will not only appear on Amazines, but it will appear across Amazines network of sites as well (this is pretty common across all article directory sites, but worth noting).