To avoid rolling out beyond a desired heading, what is a good rule of thumb?

The one-third rule is a useful guideline for pilots to help maintain control of the aircraft during turns and to ensure that they do not roll out beyond their intended heading. This rule states that when making a turn, a pilot should start to roll out approximately one-third of the way to the desired heading. For example, if you are making a 90-degree turn, you would begin your rollout at around 30 degrees of bank. This allows for a more anticipatory and controlled transition back to level flight, aligning your heading accurately with your intended course.

By utilizing this technique, pilots can effectively manage the aircraft's inertia and control the roll-out more precisely, avoiding overshoot or undershoot situations. This is especially critical in practical applications during practice maneuvers, where maintaining accurate headings can be paramount for safety and precision flying.