It is imperative that to get better ranking you need quality content and also lot of content. One cannot keep writing about each and everything for earnings. Also you need to have quality content that is not duplicated over the search engine.  For this the solution is PLR that’s Private Label Article these are articles created by private freelancer who agree and allow you to rewrite the article in your language and do the “spinning” (The process of rewriting the article in your own style and language to call it unique for the search engines).

To get these articles you can do a search on Google with your keyword + PLR and the content is available for you. Believe me some of the content is mindboggling.
When you rewrite these please do the keyword density check for better results.