Joel Spolsky's "should I start a software company" checklist
Good advice for any product or business: "Don’t start a business if you can’t explain what pain it solves, for whom, and why your product will eliminate this pain, and how the customer will pay to solve this pain."
Good advice for any product or business: "Don’t start a business if you can’t explain what pain it solves, for whom, and why your product will eliminate this pain, and how the customer will pay to solve this pain."