First specify: are your goals family or relationship-oriented, career aspirations, personal achievements, or some combination? Then narrow to what's important to you, your strengths, and what's suited to your life.
When deciding on your life goals, you must sit down and really think about what you want out of your life. Think about what you want your idela life to be like, than list down the goals necessary to get you where you want to be in life. Be realistic when setting those goals.
Life goals should be based on what you want to do in life and what resources you have to complete them. Try to set a small goal each day until you are comfortable making larger more detailed or harder goals. Be realistic and make sure you set goals you will strive for.