Success is getting what you want, plain and simple.
All success is the same, whether it results in the attainment of health, wealth, happiness, personal development, or position; success is attainment without any regard whatsoever to what's attained.
Success is an effect. Therefore, as the law of cause and effect tells us, it must have a cause and if you'll but learn and apply the cause of success, your getting what you want is absolutely, positively guaranteed because, by law, like cause always produce like effects.
What's the cause of success and how do you apply it? You'll find out in How to Get What You Want by Wallace D. Wattles.