I'll give you my two tips for when the phantom pain kicks in:

1. elevate the stump/missing body parts
if it's really, really bad:
2. lie down in the most comfortable positon, preferably your back, with the stump(s)/missing body parts elevated if possible. Cover yourself with a blanket. Plug in earbuds with music that's not agitating, but especially not boring. Adjust the volume comfortably - if you usually listen to real soft music, listen louder. Try to adjust it so that you can only hear your environment if they're shouting/talking really loud to gather your attention.
Close your eyes and ride out the waves. Refuse to move - refuse to react to the pain. Refuse to move in an effort that you know won't help. Observe the pain, don't let it dominate.

It's the only thing that works when the pain is really, really bad. It'll stop you from going crazy.