Doglegs forcing you to play safety shots.
Need to avoid obstacles in the fairway or make it around a dogleg with a powerful shot.
Addressing the ball with your shoulders aligned too far to the left will cause you to slice. Many people make the mistake of lifting their left heel during the backswing, which is one of the most common causes of a slice.
You need a fade without hooking or drawing the ball.
Needing a draw or a fade to make it around doglegs or other obstacles.
Slicing, hitting fat, or topping.
Many people sway or tilt during their swing because they are not turning at the hips correctly. This will cause you to over swing your arms, prevent a proper weight shift, and take the club off of its swinging path.
Hitting off of the toe or heel of the club face causing hooking, slicing, or poor distance. Teeing the ball up to high can cause you to make contact too low on the clubface.
Slouching or bending from the waist, not the hips. This will cause a poor rotation so you will lose distance and power.
You need to hit the ball a few yards further.