What metric do you use to determine success?

How do you determine success with your body goals? What metric do you use to determine success? The metric of choice can determine you feeling like a winner or another fail to add to the books right? Well . . . it shouldn't.

An apple a day keeps the dentist and calories at bay? Weighing scale number goes up? Bad. Number goes down? Good. Inch went up? Bad. Inch went down? Good.