Tim Keller suggests 10 things to consider in everyday evangelism:

  1. Let people around you know you are a Christian (in a natural, unforced way)
  2. Ask friends about their faith – and just listen!
  3. Listen to your friends problems – maybe offer to pray for them
  4. Share your problems with others – testify to how your faith helps you
  5. Give them a book to read
  6. Share your story
  7. Answer objections and questions
  8. Invite them to a church event
  9. Offer to read the Bible with them
  10. Take them to an explore course

Very good and helpful stuff! See Tim Brister's blog post: Tim Keller on Evangelism Best Practices for some comments on the 10 points and a few more very good related links. God help us.