Of course the most important first step for getting traffic with your articles is selecting the niche and carefully crafting your title (see Keywords in Titles: Divide and Conquer or Long-tail Keywords to Get Hits)
The best way to write a truly unique article is to sit down and write it completely from your own research and experience. However there will be limited topics for which you are an expert. However you can expand this through research, to pursue your interests and find other topics to write about.
Most articles will be written by gathering information from internet searches and rewriting and editing the source material to craft your own perspective and