The best way to start depends on whether you want a quick software setup or a permanent hardware change.
: This is a hardware-based "hardmod".
: Non-persistent, meaning you must trigger the exploit (often via the "Avatar" screen) every time you turn the console on.
To begin, you will need a reliable PC and a FAT32-formatted USB drive.
: This is currently the easiest method for unmodified consoles. It uses a software exploit to run unsigned code directly from a USB drive.