To focus on your own life and ignore the lives of others. To refrain from judging, investigating, and mind others people business. To stop being judgemental about others because you know how hard it is to have a good life, so you Mind Your Business. And work on your life instead.
Juana: (sits and works on her homework) She is minding her own business.
Mike: Hey Juana, what you doing? ( Mike is not minding his own business)
Juana: I'm minding my own business while you are not minding your own business.