I'd even abstract it to "don't start something that ties your income to hours worked". If you're working alone, you will need time off, and no one can cover for

I'd even abstract it to "don't start something that ties your income to hours worked". If you're working alone, you will need time off, and no one can cover for you. It's easier to take time off if your project can survive a few weeks with minimal work. If something comes up in your personal life, you can set the business aside and sort it out. I learned my lesson early on. I was making websites for small businesses in college. If a client's site had issues, I could not tell them "sorry, I'm preparing for a very important exam". I had to drop everything and fix that right now.