Be nice. Don't be a jerk. Be charitable. Don't be selfish. Look past appearances. Don't be prejudice. Be forgiving. Don't hold onto grudges. Consider what others want to do. Don't be a push over.
And most of all, be at one with your insecurities, and work them out. Before you can set the world onto the path of reconstruction, you must save yourself from ending up on the path of destruction. Only then, can you begin your quest to save the world.