Final answer:
When positioning a nail, ensure a snug fit and perpendicular placement to prevent bending.
Step-by-step explanation:
When positioning a nail, it should be fit snugly, meaning it should be held firmly in place without any wobbling or movement. The nail should be perpendicular to the surface it is being hammered into, with the pointy end facing down. This ensures that the force from the hammer is applied directly along the long axis of the nail, maximizing its strength and preventing it from bending.