Design thinking combines problem-solving techniques from design with empathy for users. It is a human-centered approach that starts by observing people and understanding their needs rather than defining problems. The five principles of design thinking are to empathize with users, define insights about their needs, ideate potential solutions, prototype ideas, and test prototypes with users to find the best solution. An example is how PepsiCo used design thinking to address women's snacking preferences by releasing quieter Doritos chips in trays to avoid mess and noise.