Oh boy, cable management is always difficult. I deal with this at work, too, and I have to admit I'm not very good at it. The best way I've found for managing things is velco strips, like these:
Amazon link. The absolute
worst thing is
zip ties. Oh, I could write reams about those. I hate hate HATE them.
But I usually try to bunch everything up together as much as possible and then velcro it together. I've found that people hate big balls of cables, and prefer that they're gathered together into one big rope, even if the rope is long and snakes everywhere. At home, I usually just make sure it's out of the way and hope for the best.
I have to admit, I did run out of the hook-and-loop type at home recently while I was doing to some hardware upgrades, so I used masking tape to hold everything back

Shame on me, I know!