These are very simple practices that have been passed down through the centuries because they are so effective.
Thich Nhat Hanh:
Suppose there is a storm raging – you don’t mind, because your house is solid. You close all the doors and windows, and although the wind is blowing fiercely outside, and there is rain and thunder, you still feel safe within your home. The island of self is like that. You have to practice, to learn, in order to allow that shelter, that island within yourself to appear for your use. During your daily life, learn to dwell in that safe island of mindfulness within you. Then you will be protected from provocations, you will be protected from anger, and from despair. There are many elements around you that are ready to invade you, to attack you and to deprive you of your peace and stability. So you have to organize in order to protect yourself, and to build up the practice of dwelling in that island of self is the practice recommended by the Buddha.