+1 I did stage work when I was younger and this was one of the most valuable things I took away from it.

Over-under is good for long, thick, delicate cables (e.g. mic/guitar cables). For shorter, thinner cables (e.g. USB cables) I use this technique: https://www.youtube.com/watch?v=uXMG917XsvU

I have done it so much I can now do it quickly without looking at my hands, so I just automatically do it before putting a cable away or in my bag.

I now never have to detangle birds nests of cables. Over the course of the ~15 years I have been practicing responsible cable storage, that must add up to a lot of time.