Acts 8:35 "So beginning with this same Scripture, Philip told him the Good News about Jesus."
God set up this random encounter with Phillip and a curious Ethiopian. Phillip took what the man was reading and struggling with, and from that very place had a spiritual conversation.
Your friends are thinking and talking about various issues. First off, LISTEN. Then, look for ways to start from where they are and steer your conversation towards the Good News.
Engage: Watch the video "Have you ever wondered about God" at www.engagethecampus.com share it with someone and ask "Where does your view of God come from?".