A properly done network rack is a thing of beauty and a serious upsell opportunity on any new construction or renovation project. The basics of a good rack: 1U or 2U patch panel for the Cat6 home runs, a managed or unmanaged switch, a UPS for power conditioning and outage protection, and clean cable management with labeled patch cables.
Patch panel wiring: punch down the home run cables on the back of the patch panel using the T568B standard. Each port on the patch panel corresponds to one cable home run. On the front, a short patch cable connects the port to the corresponding port on the network switch. This structure makes troubleshooting and changes trivially easy - swap a patch cable, move a port, no re-pulling required.
Switch selection: unmanaged switches are fine for residential customers who just want everything to work. Managed switches are worth recommending to customers who work from home, have smart home systems, or want VLANs (separating IoT devices from computers, for example). Ubiquiti, Netgear, and TP-Link all make good options across the price range.