I would work it into natural conversation. Like if you are talking about work say, "And I'm thankful to God for that because God has been so faithful to me and my family by providing for us." Or if you are talking about children you could say, "Jesus said the kingdom of heaven belongs to such as these." If you are talking about a rough situation that someone is having, you can share Revelation 21--that this world is unjust, hard, even miserable sometimes, but for those who have faith in Jesus, the end will be glorious--there will be no more sickness, crying, pain, etc...." If you are talking about yourself you can point to the changes in your own life--how you used to be a liar, promiscuous, whatever, but by the grace of God you have been set free."
If you've never talked about God with them at all, I would get comfortable by bringing God into the conversation whenever you can and wait for God to give you and opportunity to expand, rather than having an awkward, forced, one time conversation.
My thoughts. Be blessed.