How to have as many free 1 month accounts as you want [TuT]
The Way This Works Is On Your HardDrive You Can have 3 one Month Trials, Creating Them On The Flash Drive And Then Moving Them Will Allow You To Have More.

What You Need,

Flash Drive (1 GB or higher)
Email For Each Account
Xbox 360

Step 1: Plug in Your USB flash Drive

Step 2: Take Out Your Harddrive Just in Case

Step 3: Create A offline Account On The Flash Drive.

Step 4: Click Join Xbox Live On The Guide Button.

Step 5: If it asks You if You Have a Windows Live ID, Say No ( unless Your Email You are Going To Use is Hotmail, Then You already Have One) and Create A new One With the Email you are using.

Step 6: When The Gold Subscriptions Pop Up , Click That You Do Not Want Gold, It Should Pop Up That You are eligeble For A Free One Month Of Gold, Accept It.

Step 7: Once Youve Made the Account , Plug In Your Hard Drive.

Step 8: Go To Your Memory And Transfer The Account To Your HardDrive.
Now you can have as many Gold accounts as you want