Accurately judging your distance in pitching is important. Using a clock analogy, take the club back to 10 o'clock in the backswing, then to 2 o'clock on the downswing for a shot of about 100 yards. A 9 o'clock to 3 o'clock swing is a shot for about 80 yards, and an 8 o'clock to 4 o'clock swing is a shot for about 50 yards. Practice on the driving range to determine the appropriate swings for your pitch shots.
Timing is everything on the pitch swing. It requires less of a full swing, which makes the shot a little awkward for amateur golfers. Rhythm and tempo are keys to consistent pitching.