It is important that you learn to welcome change - otherwise you will expose yourself to intense stress. You will be aware that we are currently in the middle of a huge information revolution. As this runs its course, its impact on ways of life and society will be at least as great as the Industrial Revolution. As with the Industrial Revolution, people who resist change will be crushed by it. People who welcome change will be able to exploit the new niches opening up on a constant basis.
Success depends on adaptation to, or anticipation of, change.
For an excellent book on stress management, try The Book of Stress Survival - How to Relax and Live Positively by Alix Kirsta. This is a very pleasant, well-presented, sensible approach to stress management. It covers many important areas completely ignored by most other books.