Start by reading (a lot).Then, re-read. After that, you should have answered most, if not all, of your basic questions. Guys here are more than helpful to those that help themselves. If you have a legitimate question, and have searched, then and only then should you post. Asking a question like this, however, is a sure fire way to get ignored.
Good luck, and welcome.
Start out by reading this:
http://s4wiki.com/wiki/Tuning