Look around your environment and figure out needs that are not met. Boom, business is born. This is the ideal business advice you could give someone.
However, I want to hear specific business ideas that will yield you good dividends and is sustainable. Your contributions please. I am posting it here so as to get mature contributions.

A food business won't go wrong. As humans, we intentionally/unintentionally yearn to satisfy our insatiable needs e.g Food. Clothes et al.
I wouldn't mind to empty all I have to see this dream come to fruition.