What is the best approach to cable management on a U-shaped desk?

Plan cable management before assembly, not after. Route your power strip to a central under-desk mount point. Run a J-channel or cable tray under each desk section and connect them at the corners with flexible cable sleeve sections. Use grommets at each monitor and device location. Label both ends of every cable. A 6-outlet under-desk power strip with surge protection keeps everything powered cleanly from one central point. FindOfficeFurniture.com has U-shaped desks with built-in cable management features — call 888-719-4960.