[Cal Cruzer]

You can buy a caliper piston comperssor real cheap. If you use a pliers you will be pushing on one side or the other of the piston. Be sure you don't get it jammed in the bore. Make sure you have a couple cans of brake cleaner on hand. Have a torque wrench on hand and the torque specs. Have some wire on hand to hang the caliper once you get it off. You don't want to just let it hang on the brake line. When you compress the caliper, if you have added additional fluid at any time during the life of your brakes, you will have to suction that out of the master cylinder first or it will spill out.

If this is the first time you have done a brake job I would recommend that you at least have a shop manual on hand. I would try to find someone that has done it before to help for the first time. There are many small items that I can't even think of right now that are helpfull. A second set of hands too if you intend to bleed the brakes, which I recommend. Bleed the system completely with fresh fluid.

I don't mean to put you off of the job because it is a basic operation, it is just that you are messing with a system on the car that is directly related to your life expectancy.