Your casting tackle doesn't have sights, of course, and you don't actually aim with your rod, but the principle of concentration is otherwise identical. Aiming a cast in the general direction of a bed of lily pads is sort of like shooting at a flock of ducks-neither accomplishes very much very often. Instead, concentrate, and aim your cast 2 inches to the left of the nearest lily pad. This is like fixing your vision on the head of the lead mallard in a passing flock. Specific target, specific results. Dinner on the table in each case.