The patterns that you repeat on a daily basis will eventually form the identity that you believe in and the actions that you take. You can transform your identity and become the type of person who doesn't need motivation to perform well.
It seems that landmark dates can help people to see the difference between who they are now and who they would like to be. This difference can be motivating to engage in activities to improve the future self.
The goal of this exercise is certainly not to replace social relationships with a reflective surface -- the literally fatal moment of the Narcissus myth -- but rather to motivate you to get off the couch and engage with others more purposefully, meaningfully, and effectively.
The biggest lesson I learned from JV cross-country is that motivation comes from within. It's helpful to have a team, a coach, family and friends, or cheerleaders to show support, but ultimately, the only cheerleader that matters is you.
Why do we make bad decisions? Why do we eat that extra cookie or choose a cheeseburger instead of a salad with grilled chicken? It turns out there is nothing wrong with you when you give into fatigue or temptation. Your brain has simply run out of gas.
When the work that you do is the work that you love, not only will it come easier to you, but you will feel more aligned with your purpose as well as more satisfied, engaged, fulfilled, and inspired in your daily life.
What's sad is never having tried because you felt at a certain age that it was too late for your success. Dreams should have no age limit. The good news is that it's never too late to prioritize yourself.