If you have 50 bottles to be filled with water, you don't take a bucket and dump it out hoping to fill them all. No, you grab the first bottle by the neck, and then you pour in water until it is filled. Then you go on to the next bottle... So many churches think of evangelism as a two- or three-week program, which requires bringing in someone with a big name who draws crowds. I always ask, "Are you training each member of your church to be a witness whenever the opportunity arises?"
1 Peter 3:15-16 But in your hearts set apart Christ as Lord. Always be prepared to give an answer to everyone who asks you to give the reason for the hope that you have. But do this with gentleness and respect, keeping a clear conscience, so that those who speak maliciously against your good behavior in Christ may be ashamed of their slander. (NIV)