I've just started reading The Pursuit of Holiness by Jerry Bridges. I'm finding it helpful, and pretty easy to read. Here's one bit that really struck a chord with me-
'Why do so many Christians feel constantly defeated in their struggle with sin?
...Our first problem is that our attitude towards sin is more self-centred than God-centred. We are more concerned about our own "victory" over sin than we are about the fact that our sins grieve the heart of God. we cannot tolerate failure in our struggle with sin chiefly because we are success-oriented, not because we know it is offensive to God.
...God wants us to walk in obedience- not victory. Obedience is oriented towards God; victory is oriented toward self... This is not to say God doesn't want us to experience victory, but rather to emphasise that victory is a byproduct of obedience.'