Brian Tracy offers a holistic view at improving your business skills.  Included are not just tips to double or triple your income but also to improve your healt and well being, interpersonal skills, grooming and self presentation skills.

Everything you do today is the sum total of all the decisions you've made.  These decisions are determined by what you think, feel and do.  These things represent 95% of who you are today.  If you can succeed in altering your habits and replacing worn-out, ineffective bad decisions/behaviors you will improve your business and find yourself changing for the better.