How to Eliminate Self Doubt and Believe in Yourself

My next book is about self confidence, eliminating self doubt. If we don't heal the past, and if we are constantly feeling depressed, anxious or stressed, how do we build confidence and eliminate that self doubt? It's all about those thoughts, those bridged statements, and then compiling your evidence. So i think starting with those thoughts, building up the evidence, am support like supporting te the positive thoughts and the good way or what you want to create in your life will just change. it'll get rid of that self down....