How to save $1 million in 15 years?

How might someone possibly amass a sum of $1 million in a mere span of 15 years? Could you enlighten me on the potential strategies and methods that could lead to such a significant financial milestone? I'm particularly interested in understanding the kind of savings habits, investment choices, or any other financial vehicles that might contribute to this impressive feat. Is it realistic to achieve this goal, and if so, what are the key elements that must be in place to make it a possibility? I'm eager to learn more about the steps involved in this journey to financial freedom.