The document provides 10 key tips for building a successful app: 1) Understand the purpose of the app, 2) Brainstorm ideas and pick the best one, 3) Carefully consider monetization options, 4) Physically model the app, 5) Create wireframes for each screen, 6) Design an intuitive user interface on brand, 7) Design an icon that stands out, 8) Hire professionals to code the app, 9) Use analytics to improve the app, 10) Thoroughly test the app with real users before submitting it to app stores. Ongoing marketing is also emphasized as critical for downloads.