Mirrors help you understand what is behind, but they do not show every area around the motorcycle. Adjust them while seated in your usual riding position, with the motorcycle stationary. Aim to see a useful portion of the lane behind you and enough of the motorcycle to orient the view without filling most of it with your shoulder. Check both mirrors after adjusting, and make sure their mounts remain secure.
Before changing position or turning, use a deliberate observation routine appropriate to the situation. Mirrors may reveal a vehicle approaching, but the view can be affected by vibration, angle, weather, or vehicle size. A brief shoulder check can help cover areas the mirrors miss, provided it is done without losing awareness of the road ahead. Practice smooth head movement and maintain control; never hold your attention away from the path longer than necessary.
Road awareness also means noticing changing traffic patterns, side streets, parked vehicles, and escape space. Do not assume another road user has seen you just because you can see them. Keep a following distance that gives you time to respond, and adapt your position to visibility, road conditions, and local rules. Recheck mirror position after carrying luggage or changing handlebar equipment. Mirrors are one source of information, not a guarantee of safety, so combine them with active observation and cautious decisions.