chop stick holders.

Splurge, and use new toilet paper rolls that you remove the paper from. For greater height, paper towel rolls. For stability, maybe one end will slip into one of those rubber caps they make for the ends of ironing board feet/legs.

Plastic rebar chair, available at Menard's ( Model Number: 852058 Menards® SKU: 1831235).
15 cents each.

If you’re a clever fellow or gal you can isolate the cable using some paper towel cylinders and some rubber band and pencils. 

I've never used cable risers and I'm a bit skeptical, but this is might be a cheap way to experiment rather than let my uninformed bias rule!

Its called proof of concept: Will elevating work? Elevate and see. That's exactly what I did. Only I didn't buy anything. Why, when books and cups and a hundred other things are just laying around the house?

Only after doing this enough times with enough different materials to prove the concept, only then did I buy a set of Cable Elevators. 

Then as it turns out the more resolving things get thanks to little improvements like elevating the easier it gets to hear other little improvements, like elevating interconnects, and power cords, and routing them in nice smooth arcs that stay away from other cables.

But one thing at a time. What did it sound like when you tried your first experiment like this?

The rebar chairs is a fantastic idea!
I'm going to try that first.