How to become a millionaire?

Could you kindly elaborate on the steps one might take to achieve millionaire status? I'm particularly interested in understanding the financial strategies and investment options that could potentially lead to such a significant accumulation of wealth. Could you also discuss any key challenges or obstacles that one might encounter in their journey to becoming a millionaire, and how to overcome them? Additionally, are there any specific skills or knowledge areas that are particularly beneficial for aspiring millionaires to possess? Thank you for your insights.