I get many great wordtracker terms with a high "KEI" point score, with 0 competition, but are these still good keywords if only about 2 visitors daily are searching for these sites? Is the secret to keyword building, finding tons of these little keywords and building up huge traffic one small keyword at a time?
The purpose of a keyword search is to find keywords that will actually bring traffic to your site PLUS have little competition. High KEI means nothing if you are only going to get 1-2 visitors per day from that keyword. Yes, small numbers of visitors build up over time, but don't bother with keywords that only pull 1-2 a day. Shoot for at least 50, better yet 100 per day at the VERY minimum. Others would say even higher. Depends on what your goals are.