I haven't actually got mine set up yet so I can't share pics, but I have small hooks on the inside of my stand for all my cables. I'm also going to get some small stickers and place them a few inches apart along the length of each cord and colour code them with another label on the power point so I can recognise which cord is which without having to trace a cord to the device or power point. That, along with some rubber bands to keep everything together and out of the way will hopefully give me a nice, tidy space in my sump
As for the plumbing, I only have 1 pipe for my drain and a flexible hose on the return, so I can't do much to manage that haha.
All the wires in the stand are threaded through large conduit clamps. This was done to make it easy to pull out that wire and piece of equipement that needs replacement or cleaning.
All that wiring from under the stand and from the lights and fans in the canopy will eventually go to a cabinet on the side of the tank (to be built shortly.) In the mean time I've put up a piece of plywood to play with location of stuff and I'm continually moving these around to find the best location.
*I used cable staples as an anchor and cable zip ties to secure them to the anchors. This let's me remove the cables without needing to reanchor them. Or add more as I please.