Evangelical Christians often cast common sense to the winds in their attempts to convert non-Christians to the faith. Jews, for example, often find attempts to win them to Christ alternately amusing and insulting. One Jew, Mark Oppenheimer, has written a fine piece at Slate on how some Christians are beginning to realize the counter-productiveness of efforts that fail to convey respect for the person whose soul the Christian wishes to win. It's an article every evangelical should read.
It's understandable that Christians, given what we believe about the truth of the gospel, the afterlife, and eternity, should feel an urgency to win to Christ people we care about. Yet, it seems to me that the most honorable path to accomplishing this is to act in such a way that the other individual feels that they're respected and cared about as a person and not that they're simply an object or a statistic.
This might mean that the best way to share one's faith in many circumstances is to refrain from talking about it unless the other person shows a genuine interest. If we're living the way we should, and if we're the sort of man or woman to whom others feel comfortable talking about intimate matters, then they'll be much more likely to ask and be much more open to what we say. If they don't inquire, I don't think that forcing the conversation onto religious matters does anything to make them receptive and will often simply alienate them. I think it was St. Francis who said that we should preach the gospel without ceasing and sometimes we should even use words. There's much wisdom in that.