A lack of motivation. Success comes from loving what you do. Is your current job your passion? When your study highly successful people, you understand that they have at least 1 thing in common: they love what they do and they do what they love. Is this the case for you? If the answer is no, you can start by identifying your passion. This is the best way to get motivated.
A lack of faith. Faith is a firm belief in yourself, God or others that you can do it. Build up a strong vision of what you want to accomplish. In developing a vision, the law of attraction is going to work for you. You are going to attract people, opportunities and money that will allow you to develop an unstoppable confidence.
The fear of failure. The fear of failure doesn't exist. Neither does the fear of success. Fear stands for False Evidence Appearing Real. Micheal Jordan said himself that "Fear is an illusion". It is hard to overcome fears. One simple way to overcome the fear of failure is to read inspirational stories and quotes of people that achieved their dreams. Read one every morning. That will give you strength and hope.
The wrong strategies. When you want to build a business, to achieve something really big, you need to have mentors. You can't allow yourself to loose time, money and energy. Mentors are people that will give you the right strategies; they will provide the right information and will inspire you. They will coach you through the process. Choose correctly your experts, your models. Work with them and adopt the same thinking patterns, the same strategies, the same beliefs. If he did it, you can do it too.
Limiting beliefs. Often times we have limiting beliefs about what we want to achieve. For example, you can really want to achieve a goal but at the same time something tells you: "It's not for you, you don't deserve that" or "You can't do it, remember". These thoughts pollute our minds and darken our life. A quick way to stop these damaging thoughts is to use the power to say no! First, represent in your mind the "limiting belief" and say NO! To it. Now, represent in your mind what you want in its place and say a big YES! You will be amazed how your attitude suddenly changed about the old belief.