My first success, was setting out to lose weight and actually doing it.
To see more than a 1 lbs. drop in a week was huge. When I signed up for SP, I had been riding an excercise bike for several weeks and had progressed to where I was actually working out and burning some decent calories.
I mixed in SP calorie recommendations and it wasn't uncommon to see 2, sometimes even 3 lbs. dropped in a week. That's pretty easy to pull off at the kind of poundage I was starting at.
But, it wasn't the amount. It's just that it was almost a predictable amount based on how well I followed my nutrition and my workout plans.
I'm like "So, if I eat better and eat less calories (I never wanted it to be about just less calories, it had to be 'better' nutritionally) and mix in regular excercise...I lose weight?" Gee. I can roll with that.
Of course I KNEW that's how it worked. But until I did it, I'm not sure I was invested in the concept. It's not that I didn't believe in the idea. I think I didn't believe in ME! And when I saw it happen, that was huge. I became a believer.....in me.