Funny, I packed in Rank checking when I gave up the Pagerank obsession.
It was at the time I realised that Traffic came from lots of different terms and places, and that it was an unhealthy obsession that took me away from building my business in other areas.
At the moment I am trying to tie down what I call a Customer referer, and an order referrer. The first is the way the customer originally found me, and the second it what they clicked on to buy on. Clicks in between are also of interest, and the data is going into the pond, even though I am not sure how to use it.
I am hoping that I will learn what actually makes me money, not what Google tells me. Because their Stats lie as Mr Twain says. Maybe then I will be interested in Ranking, but for me, so long as the traffic is there, and some of them convert, thats fine.
I have one keyphrase, that is a "vanity" phrase, and brings in little business.