https://marco.org/2009/06/25/instead-of-watching-tv-or-playing-grand-theft
Instead of watching TV or playing Grand Theft Auto, work on your idea. Instead of going to bed at 10, go to bed at 11. We’re not talking about all-nighters or 16 hour days – we’re talking about squeezing out a few extra hours a week.
— 37signals on not quitting your day job