I use what GH3ST Golfer suggests, in addition to setting up a towel a couple of inches behind the ball for chips/pitches.
I set up at near the ends of the range and use the stakes that anchor the netting as targets. My goal is to fly it to the stakes, since roll out is different from the course and the range. At other ranges, I try to fly it to the base of the poles. I laser the stakes/poles to get a general idea of distance.