Ed Dale's Challenge and have learned a lot so far this year. One of the training sessions has some of the best information I have seen anywhere on keeping on top of your market. The lesson is on using Google Reader and Google Analytics. I have used both for several years to pull my information feeds together and to know what is going on with my industries, competitors, and interests. This lesson explains it better than anything I have seen. I think the Challenge is well worth it but if you just want to check out one lesson, this is it.
Using Google Reader and Analytics from Challenge.co