Effective sharing is grounded in a knowledge of God's word. Effective sharing takes time. We must remember that we are not called to make converts, but disciples. Effective sharing is sincere. For evangelism to be effective, it must begin with a genuine concern for the lost.
Effective sharing is flexible.
In 1 Corinthians, Paul encourages us to tailor our approach, though not our message to those we are trying to reach for Christ. Evangelism is meeting someone at his or her level in order to bring that individual to Christ's level without compromising the truth of the gospel. Effective sharing is discerning. Rather than anger someone who's uninterested, it is best to simply present the truth and move on. Effective sharing is tactful.