Frankly the question should be why would you not post it in other areas. There are plenty of websites looking to get fresh content and you just wrote some, so providing the article has the correct SEO attributes and you have links and contextual links it only makes sense to share that message.
A good list of sites to share that message on is in the list below
But there is more you can do than simply share your blog on article aggregator sites.
One of the best ways to increase your circle of influence is to guest blog for other people.
An easy way to do this to search for your topic in Google and reach out to the owners of the sites that come up close to the top of the search results.
You can simply ask the site owner if they would be interested in posting one of your articles.
This strategy will successful put your information in front of other readers and providing you have back links, contextual links, and an optin form there is a very good chance get you will get new subscribers