"The place to improve the world is first in one's own heart and head and hands."
— Robert Persig
This is a lesson I learned many years ago when as a young man I set out to change the world. To change anything, one must first change one's self. Are you unhappy with your job? Begin by changing yourself — improve your skills, educate yourself. Are you unhappy with your marriage? Change yourself. No one is perfect. What are you doing that makes your spouse mad? Change it. Most married people set out to fix their spouse. You can't change your spouse. You must first change yourself.
Another part of change is that only you can change yourself. No one else can change you. Not your parents, though they try. Not your boss, though he may try. Not your spouse. Only you can change you. And you will only change when you are ready.