I am doing SEO from past 2 to 3 years, achieved small competition keywords in local search engine(india). By doing directory, article submission, bookmarking, blog commenting. But i am getting bore with all this, trying to learn latest tactics in SEO which help in ranking with good search volume and competitive keywords. Now trying on "quiz" related keywords but now i failure in getting ranking. Please can any one help me in keyword research and how to achieve ranking on USA or India. I am loosing confidence on SEO as well life. Thanks.