I usually just do my best to live a Christian life…and at times, when people ask me how can I live a life like that (which both baffles and amuses them, for I try my best to stay calm, obey orders and do my duties at my best on the workplace), I then explain them it's because of the gift I received from God. many just laugh it off as me being a fool and a tool; but a few either come back for a "second serving" of what I told them or start to ask more about God.
One of my friends even got confirmed with the help of God and my humble example; alas, he later got fed up with faith, due to an old flame from his past crossing his life again and driving him again close to total despair…he was my godson, I pray for him often.
Dunno if this is in a way "soulwinning"…