Witnessing is a vital part of the Christian life; the Bible teaches that the true believer will desire to share with others what God has done for him; read John 4:28-30,39-42 and 1 John 1:1-4.
God commands us and empowers us to be His witnesses (Matthew 4:19 and Acts 1:8). Our testimony may not always be accepted, but through the Holy Spirit we can receive power to live a victorious Christian life and serve Christ effectively; read Ephesians 5:18 and Luke 11:13.
Here are a few suggestions that might help you to lead others to Christ: Live a consistent Christ-centered life (Matthew 5:17); be a friend and a good listener; pray that the Holy Spirit will give opportunity for witness and prepare the individual to receive the Word of life (John 16:7-11); and avoid arrogance and preachiness.
You should pray daily for the people on your prayer list and ask God for wisdom as you share Christ with them; read James 1:5, 3:17.