Keep your legs under you
and the ball in front of you.
The real art to fielding is to be ready before the pitch, and react when the ball is hit.
Get ready.
Guess where the ball is going. (Your first guesses may be way off, but keep doing it. Over time you'll develop good fielding instincts.)
Call for the ball - before the hit. You want the ball to come to you. Be positive - confident.
Take two short steps in. Forward movement keeps you on the inside balls of your feet. You want to be loose and fluid.
Stay low on a wide base - feet apart, knees bent, butt down, arms hanging relaxed between knees.
React.
Move to the ball.
For best lateral move to right:
Drive across with left shoulder. Turn right foot out. As upper body leans right - step with right leg, then left leg. (Don't start with a cross-over step - open the body to the ball side first.)
For lateral to left
Lead with right shoulder and step with left foot.
Keep head down, sneak up on the ball - soft strides.
Try to get there early, to face the hit (on all but the most out-of-reach hits.)
Catch.
Establish triangle - wide leg base, arms out in front, maintain balance. (Check with heel tap.)
Leg strength is the ley to fielding. Warm-up with a run. Squats and lunges are good exercises. (Older players can check out the WebBall section on Training.
Movements must be automatic. Repeat forward and back steps and laterals (to both sides) until you can do them without thinking. Use slo-mo and tai-chi techniques to break down the mechanics.
Improve reaction time by practicing wall rebounds - the wall only 10' away from you.