First rule of thumb, always pull the roller. Its much easier to pull than push (Wagon, front wheel drive, etc). Also, I agree w/ Joe (Runner) re: pinning sod on a hill. We use sod pins & put 6 pins per roll. The roll gets attached to 2 above, 2 below, 1 left & 1 right.
If you fail to plan ..... you plan to fail.