You will probably get a variety of answers. But the most common way is to remove the upper motor mounts and rock the motor forward. There is an eyelet on the bottom of the passenger side motor mount and you can rock the motor forward and then run the bolt through the motor mount bracket and that eyelet and that will hold the motor in the rocked forward position and give you a bit more access to the back side of the engine.
Hope that helps out. Those plug wire boots can be tough to get off sometimes, so just remember twist and pull and keep doing so until it comes off. It may fight you a bit but they will come off.
