Advice from Ron Convers
Start out on a measured field. Put out a target, but don’t try to hit it. Use it as your release point and throw everything flat and 70%. Make notes of where it all falls out. How long and how far right and left. Gather your discs and try again, this time at a measured distance, say 250 ft., and try to hit it. Move it out in 25 ft jumps repeat. Throw everything. When you get to the limit of a disc, remove it from the cue. Note how far and how much angle was necessary(hyzer/ anhyzer). Change the wind direction and repeat. After you’ve done this for a while you should be familiar with the characteristics of your discs, both distance and angle off straight. That way when you step up to a hole that is 250 ft you know what to throw for the conditions.
You can also use this drill to gauge how your improvements in form are affecting your throws. The use of a measured field becomes even more important in chronicling your progress.