The text I'll be preaching on this Sunday has a purpose statement for Christians: "...that you may proclaim the excellencies of him who called you out of darkness into his marvelous light." (1 Peter 2:9). That means if we're Christians, our calling is to speak of Christ to others.
If that's hard for you, here are ten encouragements from John Piper:
1. Know this: God uses clay pots
2. Get resources to share
3. Know that God may use many influences
4. Be a lavish giver (especially of good books)
5. Find people interesting
6. Invite people to church
7. Fill the city with gospel teaching
8. Use your giftings
9. Read books on evangelism
10. Pray for boldness
You can read, listen to or watch Piper unpack these ten encouragements here.