Bring a rope. If you're setting a GS, vary your turn radius from 18-27M, and a SL, 9-14M. Have someone stand at the previous gate and unfurl the rope down the fall line to the distance I stated above to help your eye determine what the proper radius is. If you don't have anyone you can wrap it around the base of the gate (untied) and bring it down yourself. Set relatively offset gates on the steeps (particularly in GS, to control the speeds) and less offset on the flats. In SL, don't get overly complicated with extra flushes and hairpins- the recommended amount is 3 per 100m and I think that's plenty.