Well i would say its the feeling i get after a workout, my body is burning but i feel very energized and overall good. For as right now im giving myself a year away from home to be more healthy and lose some weight so that is my motivation to get out of bed and do a workout, its not something big just about 15 minutes but it helps to make me feel better and look better.
My secret is that i drink water after i wake up as soon as possible. That's why i have a bottle of water next to my bed ready for me in the morning. Then i take my phone and start watching videos of people exercising and being healthy so i get motivated and start to exercise.