God's plan for enlarging His kingdom is so simple - one person telling another about the Savior. Yet we're busy and full of excuses. Just remember someone's eternal destiny is at stake. The joy you'll have when you meet that person in heaven will far exceed any discomfort you felt in sharing the gospel.
Religion is the best antidote to the individualism of the consumer age. The idea that society can do without it flies in the face of history and now evolutionary biology.