Google keeps making improvement to one of its best resources: Google Webmaster Tools (GWT). I'm in GWT several times a week pouring over tons of data and just discovered some new functionality that I'd like to share.
Google used to just report the average position at which your site's pages appeared in the search results for a particular query. Now users can click on a given search query to see a breakdown of the number of impressions (number of times your site's pages appeared in the results for the query), as well as the amount of clickthrough (number of times searchers clicked on that query's search results to visit a page from your site) for each position your site's pages appeared at in the results associated with that query. Google also shows a list of your site's pages that were linked to from the search results for that search query. Google's website analytics keep getting better.