Congrats on your purchase John. It won't be long and you'll be surrounded by your new speakers. Don't stress about the setup now, but if you can, download the manuals for all of the equipment (if you don't have all of it in hand yet). That will allow you to brush up before it arrives.
Also, what helped me was to draw out all of the connections I was going to have to make before the equipment arrived. This allowed me to save myself from not having all of the wires I would need on hand when everything arrived.
If you do need more wires, be sure to check monoprice.com for quality cables at very reasonable prices.
Jason