As a pastor, I addressed the sorts of issues I see people struggling with most and the issues talked about most directly and most frequently in the New Testament. That leads us to recurring concerns with sexual immorality, relational sins, and vices associated with the breaking of the Ten Commandments.
The mystery of the Christian life is that Christ expects us to flee sin and the devil, but does not expect us to rid ourselves of either on this side of glory. Repentance is a way of life, and so is the pursuit of godliness. I wish every Christian could be reminded of these two things.
As a pastor in a Protestant church, my whole ministry centers on the conviction that by grace we are saved through faith. And it's not our faith that delivers us, as if believing something, anything at all were pleasing to God. It's the object of our faith - Christ's life, death, and resurrection - that saves us.
I try to keep in my mind the simple question: Am I trying to do good or make myself look good? Too many of our responsibilities get added to our plate when we are trying to please people, impress people, prove ourselves, acquire power, increase our prestige. All those motivations are about looking good more than doing good.