The one thing that makes a significant change for me is sleeping well. For me to get a good night's sleep, though, I need to exercise during the day, dim the li

The one thing that makes a significant change for me is sleeping well. For me to get a good night's sleep, though, I need to exercise during the day, dim the lights at night, and to keep a consistent time of going to bed. The biggest part of exercise = happy, for me, is the fact that I sleep well afterwards.