Eyes level and focused on the pitcher's release point. Swing should be short, quick and simple. Stride should be short and soft. Keep bat head above the elbow. As back foot pivots, hands begin to move.
Front elbow leads hands to ball Keep head still, eyes on the point of contact.
Wrist rolls after contact, not at contact. Finish the swing. Slow bat - bat too heavy, bat to long, player tired. No follow through. The Infield Fly rule is a rather bizarre rule implemented to avoid what could be a triple-play in the event of an infielder intentionally not catching the ball.