Ferrite beaded cords, and especially double-sided ferrite beaded cords, seem especially uncommon. Are there other, perhaps more effective ways, which I should be minimizing the EMI of my overcrowded workstation?
First thing to do is determine the EMI source(s). Chargers for mobile devices, LED room lighting, and/or rooftop solar panels, etc., can easily generate a noise floor above that of your workstation. Neighbors can generate EMI closer to your antenna(s) than your office.
I cut the main circuit breaker to my house, and turned things on one at a time to find the worst RF noise sources. A printer in another room was one. However I found the noise floor went down even lower when there was a neighborhood wide power outage, so some of the RFI is out of my control.
For the worst random power cords, cables (USB, ethernet, video, 12V, etc.), and coax feed lines near my radio receivers, I wrapped a few to several turns (often limited by how many turns fit), thru type 31 or type 43 ferrite toroids. I saw little to no effect from using single no-name clamp-on ferrite beads, or cables that came with them (but use them anyway).