What were some of the key doctrines that resulted from the Reformation?

Paul Carrington explains in this video that the sufficiency of Scripture and the idea of God’s grace were two, key doctrines that came out of the Reformation. Man cannot do anything to assist to be brought into the right relationship with God. This was something that was unheard of. At that time, Christ was merely one means out of many to somehow "merit" salvation, which could be lost. 

But Scripture makes it clear that salvation does not hinge on our efforts to make ourselves right with God. It is only through Jesus Christ that we can be made right through faith and repentance. The Reformation helped to correct false ideas and teachings and point individuals back to Scripture.  

Ephesians 2:8-10 (NKJV) – “For by grace you have been saved through faith, and that not of yourselves; it is the gift of God, not of works, lest anyone should boast. For we are His workmanship, created in Christ Jesus for good works, which God prepared beforehand that we should walk in them.” 

I think, you know, the doctrines that resonate most with me that came out of the Reformation, definitely the sufficiency of scripture, but also the idea of God's grace, the idea that man can do nothing to assist in his resurrection before the living God and when I say resurrection I mean him being made or brought into right relationship with God to me that is at once the most devastating and at the same time the most hopeful in that it doesn't really depend on me to make myself right with God, to justify myself before God. But through Jesus Christ, through the Lord, we ourselves can be made right by faith through repentance and trusting in Him. And so to me that was one of the most important things to come of it, especially when you think of the time where the Lord Jesus Christ was maybe one of a variety of means to salvation in the sense that yes you would confess Christ but then you would rely on a variety of other things to bring you into right relationship with God and woe unto you if you ever at any point fall short you end up losing your salvation.

And so the idea of grace I think is supremely important. But also you