I came across an interesting website off the beaten track. It has a few useful links to help you if you have lost your zeal for evangelism. Mark Edward Sohmer has a couple of helpful notes:
I am a member of Fellowship Bible Church in Chester, NH. In 2006, I was given the privilege and honor to lead an Evangelism class from The Way of the Master ministry. The class is called the Basic Training Course. You can learn more about this class at: http://www.wayofthemaster.com/btc/. I am making available my notes and other files that may be valuable here, so that anyone can download them. My prayer is that Christians will be edified and equipped to fulfill our purpose: to be used by God to seek and save that which is lost.
More info here from his website.