How do I stay motivated to eat right and exercise every day?

There is a lot of advice and recommendations touted to help one stay motivated, but honestly I simply go to Walmart and look around. I vow never to let myself become like some of the people I see there. I'm not judging them, but I believe there are some who accept mediocrity. Maybe they don't believe it is possible to make better choices or their life circumstances are so difficult that they are stuck in a bad place. Whatever the reason, I am motivated by them to eat better, exercise on a regular basis and work hard to achieve all of my goals.