When installing it is of course useful to label the wires to avoid having to trace them when modifications become necessary. I was wondering what people are using for this.
The following solutions I found unsatisfactory:
isolation tape: the glue is too "liquid"/"soft" causing the tape to slide on the wire and leave sticky residue. Also it tends to become even softer in warm environments and falls off over the span of a few years.
brown packing tape: while a good solution short term, the glue becomes hard and pulverises over the span of a few years causing the labels to fall off
I've actually struggled with this same problem. I have a small home music studio with a dozen MIDI, USB and audio devices. There is a rat's nest of cables and it's difficult to tell them apart.
My solution was to have some custom vinyl stickers made up. The nice thing about this as opposed to some of the solutions mentioned above is that I was able to customize the colors and patterns of the stickers so I can tell at a glance what is paired up with what.
The label printers are nice, but it is not really an ideal solution for quickly identifying cables.