the driving mirrors
Use the mirrors well before you intend to signal
Use the mirrors well before you intend to change lane and direction
through corners and bends.
Generally, use them often to reduce blind spots and make it
easier to judge speed and distance.
Use the rear view mirror before you slow down to be aware of
the gap between you and the driver behind especially when braking
up to an amber traffic light - you could make the wrong judgment
Check the rear view just before you accelerate, - a following
driver may be alongside you!