I will tell you what motivated me:
When I started workout out in the gym, I was in awe when I saw a big guy walk by. There was a time I looked at the 100lb Dumbell's and I thought to myself, "Who the hell could even move those things?"
As time went on, soon I would be working out and in the mirror I could see some young kids watching to see what I was doing. The thing is, that was ME when I first started. - That's Motivation!
Day-to-day I don't see changes in my body, but when you look back at an old picture and see what you used to look like, the way I have transformed my body - That's motivation!
I look at all the people I grew up with, went away to school, and came back fat - That's Motivation.
What motivates me? I would have to say My Own Accomplishments. And knowing that there is no end if you have the heart and dedication!!!!