On a different tangent from the one kapeedranos took, many people use their money as a sign of success. I would suggest if that's the route you're taking, to choose reasonable goals that you can achieve in short terms. Let's say you set yearly targets for savings, and you can continue to meet them, then you have been successful. Some people choose arbitrary amounts like being a millionaire, or having a house valued at a certain price.
I'd like to opine that you can feel successful at minimum wage, as long as your wage affords you to fulfill your interests and goals that you've set. People have their own gauges, and half the battle is figuring out what yours are.