That's a good question to ask for it shows how concerned you are to be aware of your surroundings for safety and how concerned you are to know who is behind you and what, if anything, you should be prepared for. I like to call this "Driving 360." Don't just look forward but be mindful of the "circle of life" around your position.
How about your concern for the "circle of life" around you where you live, where you study, where you work, where you shop, and, basically, where you are at any given moment? If you're a Christian part of your life should be thinking of the people in your immediate surroundings and thinking how you can "let your light shine" so they can see what you do and "glorify your Father in heaven," Matthew 5:16.
This study is to encourage every Christian to recognize the "sphere" of evangelistic responsibility they have at any given time in their life. Yes, I'm talking about "soul winning" or whatever term you're comfortable with. I know there are many people who don't feel at ease immediately engaging someone in conversation about their eternal destiny or their idea of what is meaningful in their lives. But all Christians should recognize that God has placed them where they are in order to live their lives as a witness to those around them. That witness may be just a kindness and concern for others, but it may develop into a real conversation too, especially as the Holy Spirit opens up an opportunity to do so.
Evangelism 360 is my way of recognizing that my neighbors in my neighborhood are my responsibility to pray for and seek their salvation even if I don't actually talk with them. Praying for them is powerful! But, for me, I find my prayers often bring me to talking with those I pray for. But it doesn't stop in my neighborhood. I realize my "neighbors" are the people around me wherever I am. And that includes the "strangers" too. Whether at home, at work, at school, while shopping, or just walking, the people all around me are part of my mission field. And yes, I look out my back door as well.
Watch for further studies on this.