This article goes over how to setup FreeNAS 11 and configure it. These are the basic steps so you can have a reliable network storage at your house.
Install FreeNAS Video:
Setup FreeNAS Video:
This will get you set up for a reliable network-attached storage in your home environment. Remember once you are finished to clone and image the USB FreeNAS drive. These USB Drives typically only last a couple years, so a backup is a must! In the end, FreeNAS is far more reliable than other commercial NAS products because of ZFS and its versatility.
For further configuration, I highly recommend checking out the FreeNAS wiki for using some of its more advanced features.