My passions drive me to the typewriter every day of my life, and they have driven me there since I was twelve. So I never have to worry about schedules. Some new thing is always exploding in me, and it schedules me, I don’t schedule it. It says: Get to the typewriter right now and finish this.
You do something all day long, don’t you? Everyone does. If you get up at seven o’clock and go to bed at eleven, you have put sixteen good hours, and it is certain that you have been doing something all that time. The only difference is that you do a great many things and I do one. If you took the time in question and applied it in one direction, you would succeed. Success is sure to follows such application. The trouble lies in the fact that people do not have one thing to stick to, letting all else go.
Thomas Edison on productivity.