The first thing to keep in mind when sharing the gospel is knowing the fundamental obstacle to salvation. The individual with whom we are sharing the gospel must come to know and embrace their helplessness. Although the ministry of the Holy Spirit brings men to this realization, it is our responsibility to use the word of God in explaining their condition. Men must know that they are absolutely in bondage to sin or the work of Christ cannot be understood. Those who do not know that they are lost never realize the need for redemption.
The problem that exists in most gospel presentations centers on offering the gospel as a means of forgiveness and benefit. Many people “believe” the message containing warmth, love, and forgiveness and remain content with their current life of sin. I would not deny the fact that there are great benefits and total forgiveness as part of the gospel. However foremost and fundamental to a man’s salvation is the realization and understanding of the need of repentance.
Therefore, to realize true conversion within a gospel presentation a change of nature must take place. There must be a deliverance from self. In the words of the Apostle Paul,
“…if anyone is in Christ, he is a new creation; old things have passed away; behold all things have become new.” (II Corinthians 5:17, NKJV)
The gospel message includes a full presentation of the need for repentance. Repentance is more than merely a change of mind, whether it is a change of mind about Christ or sin. Repentance includes a change of action, direction, and even desire.
A man who has been regenerated by the Holy Spirit will have as a result of the indwelling Holy Spirit a desire not to sin. William Wilberforce prayed,
“O God, deliver me from myself.” 
Even in a new convert this sentiment should be present. When a man has been brought to realization that he has no spiritual ability to save himself and that by nature he is under the wrath and condemnation of God a major obstacle has been removed. He now, by ministry of the Holy Spirit knows that he is guilty and is only freed by repenting and trusting in the finished work of Christ.
Do not be afraid of “preaching” the law to enable the Holy Spirit to produce deep conviction. Don’t start at the benefits of salvation. Otherwise, you face at least two problems. First, a person’s motivation for salvation will be merely for the benefit rather than for the fact that they have offended a holy and righteous God who has condemned them. Second, the Holy Spirit will not regenerate an individual which results in a “convert” to warm and fuzzy sentiment rather than a convert who has come to know his sin and guilt and repented of their sin. Present the full truth of the gospel in such a way that men cry out, “O God deliver me from myself!”