Bowl the ball and knock the pins

photo from ourworld.compuserve.com

photo from winbowling.com

Four-step Delivery - from eHow.com (with my little notes in italics)

Step1

Pick up the ball and go to your starting position.

Step2

Hold the ball on your bowling arm side (not the center of your body) to create a straight arm swing.

Step3

Take a deep breath and relax.

Step4

Take your first step with you right foot if you are right handed, or with your left foot if you are left handed.

Step5

Move the ball out and down, away from your body, as you take you first step.

Step6

Allow the weight of the ball to swing it past your side as you take your second step.

Step7

Take your third step as the ball reaches the top of your backswing.

Step8

Slide your foot on your fourth step, and swing the ball down into the release. (focus on the arrow that you are throwing to)

Step9

Close your fingers together, like snapping, as you release the ball.

Step10

Follow through, extending your arm towards the pins and continuing upward. (swing arms completely like a pendulum - to avoid the gutter or getting the ball too far to the left/right)

Step11

Finish with your left foot in front (or right foot for left handers), and your back foot pointing toward 7:00 (with 12:00 being the pins).

Step12

Keep you shoulders square to the foul line

Most importantly, FOCUS and always remember to HAVE FUN!

P/S : There are many interesting articles about "how to" bowling at http://winbowling.com/