Mount the power strip to the desk, or buy one of those long metal ones designed to be mounted, thats one thing I used to do when I used a desk. Then I would wire tie up all but the last few inches of the power cords.
I then standardized on hardware as much as possible as I've found that most things run on 12v or 5v so I built one large power supply from an old pc and ran low voltage to all the stuff replacing a half dozen wall warts.
When you buy external enclosures for drives and such buy all the same brand, I bought a couple until I found one I liked then went and bought a few different sizes and put them away until I would need another drive then pull one out and stick it in so I was able to make a dasy chain power cord for them since they were all the same.
Now a days I run from a laptop exclusively so there is no external mouse, keybaord, monitor cable to get in the way, just one power cord. Then if I need to run a backup or burn a cd/dvd I pull the drive out, plug it in, burn, unplug it and put it away, that way all those misc cords are only out for a little but.