Start by looking inside yourself. Your ability to improve your business is directly connected to your self-improvement ability. Think about where your business is and where you want it to go. If you need to make changes to get to the next level, figure out how to make improvements while sticking to your vision. Your business will get better if you keep track of the things you need to do to grow. You will become a better business owner as you learn to trust yourself more, especially when facing challenges.
Stephen Covey, Peter M. Senge, and Kevin Cashman have all written good books about leadership and self-improvement. Covey writes about "principle-centered leaders" as people who are constantly educated by their own experiences. His books can help you improve your personal and interpersonal effectiveness and find the most natural leadership role for your personality. Peter M. Senge, author of The Fifth Discipline, talks about the discipline of personal mastery. Personal mastery is a process of constantly focusing and refocusing on your wants and vision for your business. Finally, Kevin Cashman describes all of this as "leadership from the inside out." He believes that you grow the person and grow the leader.
Committing to self-improvement means committing to change. That means overcoming those things that have been holding you back, like emotions and bad habits. Once you deal with old, bad habits, you can commit to the present and the future.