alright, this is a very delicate process, as there is a lot of pressure in the springs.
lift vehicle by frame, jackstands, remove tires, etc....
put a floor jack under the rear axle, remove u-bolts, and rest the axle on more jackstands, blocks of wood, etc. basically, the leafs should hang down freely.
place c-clamps on either side of the leaf spring center bolt before trying to remove it.
after this, you should have something like this pic of my bronco II
after you get the center bolt out, slide a long screwdriver through the hole to help keep the leafs in line for the next step
which is unscrewing both c-clamps to gradually separate the leafs. then you can just grab them and take them out. remember the order and direction of leafs when you put them back together.
which i will explain later (gotta eat