Here is a good place to start:
http://www.hsbaseballweb.com/recruiting_tips.htm
Recruiting services don't do anything that you can't do yourself. If you'd rather pay someone else to do what you can do (and probably not even as effectively), then get signed up and send them a check. You'll likely be disappointed in the end.
All of the communication with the program's & coach's is going to come from you anyway.... Why not save the fee?
The info contained on/in this website will help guide you through the process. Read, search relevant topics, ask questions, etc.
Good Luck & don't get discouraged....it can be a tedious process.
Also......if your screen-name indicates the importance of where baseball fits in your college plans, you might want to reconsider all-together! lol