"I knew from numerous research studies that exercise in the morning raises your performance on cognitive tasks and gives your brain a “win” to start a cascade effect of positive emotions. Each night before I went to sleep, I wrote out a plan for where I would exercise in the morning and what parts of my body I would focus on. Then, I put my sneakers right by my bed. Eliminating the choices and reducing the activation energy made getting up and going to the gym the default mode."

— Shawn Achor, The Happiness Advantage