Simple: Ask the Lord to send you a dream, and then seek Him in prayer for the interpretation. If necessary, seek out an interpreter for help on it. Dreams are the simplest, easiest way to receive from the Spirit of God, IMO. Anyone can, from youngest to oldest, which is why I think they will help form the backbone of prophetic ministry in the end-times.
I'm not really an evangelist--more of a teacher. But on occasion, when I really, really discern somebody God loves and feel I must reach out to them, I will. On one such occasion this friend was blatantly pagan--to the point of mockery, and intellectual in orientation, being a reader in philosophy or false religion.
I wanted to ask him to simply ask God if He's real, and did approach him that way. But the thing that really touched him was emotional. He had a bed-ridden Mother, and lived in poverty with her. And he, I think, despised himself for his failure in life, to get a job, have a family, or help his Mother--I don't really know.
What I do know is what reached him was not really intellectual, although you could argue for that. It was emotional because he, like so many of us, were simply looking for something real that could help with the emotional pain. God provided that for him.
Another friend had been a goer to a somewhat liberal Christian church and was very loose morally with women. He paid no attention to whether they were married. He just complained that he could never find the "right woman."
I took a chance and told him God had chosen him to be saved (discernment), and encouraged him to take Christianity more seriously. Later, I discovered he did that very thing, becoming openly evangelistic in the work place. But he continued to struggle with women and with thoughts of suicde.
I recently saw him, and he seems like a truly changed man. He enjoys confidence and will, I think, solve many of his big problems.
Sometimes we have so little to do with helping others. We simply have to choose to do so if we really care and are given the opportunity. We may be the only person with enough guts to reach out to those who look so hostile to the Gospel. They are lambs on the inside, and we can truly appeal to that.
It is our *spiritual love* for them that matters--we must express it sometimes. That may open the door that's needed?
It is supernatural love that changes people. But everybody is different. Some people need to see lightning come down, or be healed. Some need to hear tongues interpreted in their own language, or words of supernatural knowledge about them.
God knows what people need, and we need to be sensitive to that. God moves when we obey His word to us.