Tip 1: For purely cosmetic reasons it is a good idea to finish the laminate about halfway in to the door opening. That way the transition point will be hidden under the door - when it is closed.
Tip 2: Also remember that it is best to install the laminate, or any finish flooring materials, before the door frames go in. That way the gap between the flooring and door opening is hidden by the door frame.
9 Tips for Installing Laminate Floor - Jan 12, 2009