Ideas for innovative products and services often come from observing everyday life. SCAMPER is a technique that helps modify existing products by substituting, combining, adapting, modifying, putting to another use, eliminating, or reversing aspects. Developing personas and gaining customer empathy are important for understanding user needs. The lean startup method advocates building something customers want based on personal experience, passion, expertise, a clear vision, market opportunity, and strong team as signs of a good idea.