If you're going to invest a valuable asset (like time), go ahead and make it productive. Use a postit or two, or some index cards or a highlighter. Not to write down stuff so you can forget it later, but to create marching orders. It's simple: if three weeks go by and you haven't taken action on what you've written down, you wasted your time.
Seth GodinWhen you think about Uber and Airbnb and the other companies that are turning things upside down, Uber isn't big 'cause they ran a lot of ads. They're big because someone took out their iPhone and said to their friend, watch this, and pressed a button and a car pulled up.
Seth Godin