Like many who came to Christ in the days of the Jesus Movement, I was taught and came to believe that the Gospel was summarized by the Four Spiritual Laws. These laws in order are the following:
1) God Loves you and has a wonderful plan for your life
2) You and all humanity have sinned and turned your back on God
3) God sent His Son, Jesus, to make a way back to God through the cross
4) If you accept Jesus as your personal saviour, you will be saved
There are many slightly different versions of this, but basically they all begin with acknowledging that one is a sinner and separated from God, and end with some kind of acceptance of Christ accompanied by assurance of salvation.