I found an exceedingly cheap and effective way to lift my cables off the floor (carpet). Go to Bed, Bath & Beyond and purchase some white, ceramic creme brulee cups for $1.99 each. Turn them upside down and lay the cable on top of the cup ... for an 8' run of cable, you'll probably need 2 or 3 cups per side. FYI, certain expensive cable elevators that run about $24 a piece are also made of white ceramic. They're much larger, bulkier and more expensive than my solution. Try it.