Structuring your evangelistic message
Small animals need a skeleton as much as big ones do. Likewise, short evangelistic messages need structure as much as long ones do. Every element of the message should hang together. Let me offer you the simple outline we use.
For OTRB this is (1) a worksheet for the early stage of planning a message and (2) the unifying structure that will hold any evangelistic message. My thoughts in italics.
Idea: Walls separate 
Doctrine: Reconciliation
Verse: Col. 1:20
Object or Story: A wooden wall or large bricks made out of foam rubber
Bad News: Our sin has caused a severe separation between us and God
The Cross: Jesus on the Cross took all our sin and by his death and resurrection is able to tear down the wall and bring us into friendship with God.
Good News: We no longer have to live separated from God. [or we are reconciled or the barrier is broken down] Sin is removed; we can know God. Not only will this help you in this life, but afterwards, we have the promise of eternal life.
Call: Turn from all the things that don’t please God now. [Repentance] Place your trust in Christ who is the only one that can remove the wall.
You are bound to omit something important if your message is not structured and you are most likely to forget either the Cross or the Bad News; or you will end up adding unrelated comments. The unconverted don’t like to hear or talk about sin or the cross because it’s so confrontational. Danger: do no change the message to suit your own desires. The message will be razor sharp if you preach it in its fullness. To not mention sin and the cross will blunt the gospel message and only result in false converts. Preach it right. God will do his work!
jacob bock
Great message…once I get back to Kingston, my first message in the streets will be using chains to represent the bondage of sin…and in Kingston they already know this since it is the second most dangerous city in the world in which to live due to the high murder rate not to speak of injustice, poverty, rape, violence, and fear. I am so glad to have found a site like this where the BAD NEWS is first preached before the Good News. I was in medicine for thirty years as a pharmaceutical rep, I gave over two hundred thousands presentations to doctors who didn’t think they needed what I had, yet, once they realized my products actually met their perceived needs, they bought. It’s the same with sin. People know they are messed up, they just don’t like to admit it. Furthermore, as their conscience is already telling them, they also know they have sinned against a Holy God. All I have to do, by using the Law and the Word of God, is to show them they are sick…then they will bang a door down to hear the good news I have to give them. Thanks again. Great tips…let’s stay in touch. Still wondering about getting a Red Box for Kingston, but I think I will make a platform out of wood…a portable one. I have already made the design, it will be easy to make, it will be easy to use, and it will bring glory to the Lord Jesus. It will be twelve inches high and three by three…simple design, I’ll paint it red, the design itself looks like a Cross so I can even use the pedestal as a metaphor of having to stand on the Rock, build my house on the Rock, and that Rock “was Christ”…the rock upon which we must stand or it just might turn us into powder…Mamma mia…que bueno, que el Senior te bendiga…Rico