One way that you can increase your sense of self-worth is to attach yourself to a cause that you believe is worthwhile. As you pour yourself into the cause, you begin to realize more and more that your life, who you are right now, matters a great deal because you can see the impact you are making on the world. This is not a placebo effect. You can see the aftereffect of the value you are creating for other people by applying what is within you. If you constantly try to be someone you are not in order to achieve something that matters a great deal to someone else, you are essentially living a false life. Find a purpose that you really believe is worthwhile and pour yourself into it.