You already know the benefits of a having a home network; being able to share resources. The most important things you will want to consider are the number of devices you want to connect an how you will connect them, either wired or wirelessly.
A wireless connection is great when the signal strength is strong in all of the locations you plan on having connectivity. You will be able to roam around and still be connected to the network. A wired connection requires more setup, wiring the house, and offers the most reliable connection.
Connect all computers, printers, scanners, modems, switches, network access storage (NAS) drives to the router.
Make sure all of the devices can see the shared devices. Do test prints, test scans, and try accessing shared drives. Test to see that you're online.