If I'm hooked up at my camping spot, I use the slinky thing that Tim referenced to elevate the hose. (NOTE - Many RV parks / Campgrounds require them)
However, at the dump station, I just let it lay on the ground. I dump the black first, when its empty, I walk the hose to make sure its drained. i.e. Lift the hose near the MH to form a hump, then walk that hump to the sewer to drain the contents of the hose. Leave the drain valve open on the MH while walking the hose so the hose can vent back through the MH system.
I then close the black valve and repeat the process with the grey.
2001 Coachmen Mirada (Ford F53 6.8L V10) - Toad 2001 Civic
It won't do MACH 2, but I can get a sandwich and take a pee.