[header] How to promote one's religion or faith [title] Live your faith. [step] The way you act should reflect the things you believe in your heart. " actions speak louder than words " so they say.... when people notice a difference in your actions than everyone else's they will be drawn to ask how and why you are different. 
This is the perfect time to explain that you are different because you are a christian. You believe in living differently than other people because of your religion.