Join up with all the insights/statistics/analytics accounts with each service you are a member of and manage them daily. Take your time, you will not understand them over night but you will surely see the benfits of your efforts once you have this lot baked in your brain!
2. http://twittercounter.com/ is a great way to see the growth of your own follows
3. http://visibletweets.com/ is a way to view tweets based on a keyword search.
4. http://www.facebook.com/help/search/?q=insights this page gives you the low down on how to handle FB insights
5. https://www.twentyfeet.com/ – tracks the lot – a great way to track tweets, retweets, facebook, google analytics, you tube and myspace!