Just hit 500,000 views on EZA ... on a total of 680 articles. I have been writing on EZA for about 1 1/2 years now and have learned quite a bit. I used to average 150 CTR per article but now it is up to 750+ on avg. The best advice I could give is what has been said thousands of times on the WF already:
Good keyword research AND implementation = Success
Of course, there are other factors involved but keyword research is by far the most important IMHO.