Finding and holding on to Motivation on any aspect of life is important. Things will happen in life where we lose that motivation when we are in that creative process. It is important to find things that motivate us and we can use to help us continuously have motivation. Self doubt is destructive in many ways as it could halt the creative process as well as other aspects of ones life. Motivation triggers behaviors and if you want those positive behaviors factoring in your life than make a change. So think about the things that motivate you to succeed whether it is people, ideas or simply wanting to be successful.
A Last Note:
Remember set goals that you want to accomplish! You can do anything if you are motivated to do it.