the best apps to mess with after you have rooted are Tasker, Set Cpu, Rom Manager, Titanium backup, and a good wireless tether app. And the best way to take advantage of you newly rooted phone is to flash a new rom onto it. Before you do though make sure you read up on the how to's. And please don't forget to make a backup! There are a bunch of different forums that will help you out I started with XDA. Good luck and happy modding!