I could be wrong, but...
1.) One True God, and that the Godhead is three in one--father, son, holy spirit.
2.) That the Bible, New and Old Testament, is true and inspried word of God
3.) One should be Baptist by immersion in water
4.) That the church is a family of believers, called by God for service
5.) That Jesus' Salvation is for all people and can only be accepted by believing that Jesus died for our sins and rose on the 3rd day.   

I think Paul hit the nail on the head, but here is a couple mor to think about---
1.) Our purpose as christians is to tell the world about Jesus Christ, Him crucified, and His ressurection.
2.) In all we do we should glorify God not ourselves. (This one may not be sound doctrine but if we glorify Him in all we do than we cant get in the way of His mighty hand.)

Way to go guys !  I believe both of you are right on target. It's important for everyone to know what "Sound Doctrine" is and to know what they believe.