quick and relatively painless. Unlocks your bootloader, roots, installs custom recovery. Also options for pushing or pulling files to and from your device, flashing back to stock (using factory image) and other goodies.
If you want the easiest way, this toolkit is it.
WugFresh
This will void your warranty. It will also wipe all your data (make backups before doing anything!!!). Also it is highly recommended to learn ADB commands so you know exactly what toolkits similar to this one are doing. I need to learn ADB but in the meantime this is the program/toolkit I use.
Make backups, read, research, double check you've got backups, and go ahead.