In The Achievement Habit, author Bernard Roth gives us the design thinking principles.
1. Empathize. Care about the user's experience and figure out how to help.
2. Define the problem. Narrow down the problem you're going to solve.
3. Ideate. Use brainstorming, sketching, and other creative techniques to generate potential solutions.
4. Prototype. Build low fidelity prototypes you will show to customers.
5. Test and get feedback.
I encourage you to read the book and gain a deep understanding of the principles and how they work together.