Make sure you have a lot of time (like a weekend). If you are changing the water pump, flush the system with water - do't forget the heater core. You want only water in the cooling system because when you remove the water pump, you probably will have a mini flood eject from the block. DO NOT change the oil (yet) - if any debris falls into the system, you want to catch it early (and not 3K+ miles later). Allow the engine to completely cool down.
Use the plastic baggies and sharpie to mark EVERY fitting you remove. This will save you a great deal of time.
I had to wait for a part from the stealership (1 stripped waterpump bolt). It took 4 days (I was leaving for school on the 5th day). Because of the organization, I was able to fully reassembly (minus setting the T-belt on the cams) within an hour (maybe slightly over).