The main thing I bought for cable management is some raceway, one section of this here that I then cut up into three sections, and used two on the desk: https://www.amazon.com/gp/product/B00066HOPM
There are a variety of options for tidying up - modesty panels that have pouches for cables, adhesive-backed loops/straps, trays, raceways, and good ol' zip ties are the ones off the top of my head. I went with the raceway because it was low profile and the cheapest option. I then mounted a surge protector underneath at the end of the raceway, mine's a Tripp Lite that I bought because it has a slightly longer 7' cord with a right-angle plug, and keyhole mounts on the underside so I could use screws (most have this, but there's always 3M mounting tape if not).
Agreed. It's also commonly called "finger duct."