At the TheResurgence, there is an interesting article written by Jonathan Dobson.

Eat with Non-Christians

Walk, Don’t Drive

Be a Regular

Hobby with Non-Christians

Talk to Your Co-workers.

Volunteer with Non-Profits.

Participate in City Events

Serve Your Neighbors.

I grew up in an atmosphere which denied the existence of the world – or seemingly so. They would no associate with anyone outside the ever decreasing church membership. They never sought to go into the world to rescue the loss. They detested others.

I agree with all of the bullet points, maybe not fully with the summary given (on their page). It is important to carry the Gospel to the world.