I found an article on Evangelism.net and it actually focuses on how to get new believers involved in evangelism. However, to me, the list could apply to anyone who is a leader in ministry.
1.) Be an example—people are watching what you do, and they tend to pay more attention to what you do than what you say. When new believers see other believers evangelizing, it encourages them to do the same.
2.) Evangelize in teams—pair a more experienced evangelist with a newer convert. Whether it be witnessing in a park, church visitation, or simply visiting a friend you think would be open to the gospel, take along a new believer. Your experience will help them, and hopefully their newfound joy will encourage you.
3.) Pray with them for specific people who are not believers—praying for the lost increases our love for the lost.
4.) Realize that it is not about the numbers—God tells us to take the gospel to lost people, but it is God who does the saving, not us. With that in mind, we don’t need to feel like a failure if someone doesn’t trust Christ after we have shared the gospel (1 Cor. 3:6–8).
5.) Remind them that fear is normal—it is an experience that everyone deals with. The Apostle Paul even asked for prayer for boldness, something he would not have needed to ask for if he didn’t have fear.
6.) Tell them it is okay if they don’t have all the answers—It is okay to say, “I don’t know.” Unbelievers are more impressed by someone that admits they don’t know an answer than by someone who makes up an answer or acts like a know-it-all.
7.) Help them learn a basic method—there are many good methods, but having one basic method that they can always use is a must. It frees them up to talk and listen, instead of worrying about what to say next.