I am not asking folks here to join a management class for this. Its something time management and little bit efforts on planning that one should follow. However, there are chances that even if you note down in calander, still you will miss something due to over concentration on your work.
Use the words, sorry ( in your personal life)and thank you with your (professional life). When u want to balance the work and personal life plan before you sleep or immediately when you get up.