After you connect your Xbox to Xbox Live and test connection you need to sign in then you press your controller guide button once and select Join Xbox Live and follow the steps...* Just remember not...
You turn on the XBOX plug it in to your router with an ethernet cable (6 bucks at staples)
Select "Xbox Live" then Create account. Fill out the info it requests and then you are done.
If you have a credit card, go here:(link moved) If you are having issues with connecting your 360 to X-Box live then you would want to try and make sure you have a good Ethernet cable connected to...