How often do I meditate on the wrath of God?

It's one of those topics that we know about it, believe in and mention - but I wonder how much I ever really think about it properly? The wrath of God often becomes for me one bit in a gospel presentation (box 3!) which I then move on from. I wonder whether, perhaps strangely, this leads me to be both legalistic and superfical at the same time. I haven't really gone down into the depths of the wrath of God in my own spiritual thinking so I can only 'use it' as something to scare myself and others with, rather than to use it to convict us of sin. It would seem to me that the main purpose of the Bible's teaching on God's wrath is not 'run-because-you-will-be-punished-and-you-don't-want-that' but 'your-sin-is-heinous-and-God's-anger-tells-you-just-how-bad-it-is.' I fear that we think of God's anger only as something to escape from rather than as a mirror to who we are. I know it sometimes takes people to get angry with me before I'll see that I'm doing something wrong. How much more true this is of God! Surely, as Christians we can meditate on this with great profit because we will see more of the holiness of God, the awfulness of sin and the wonder of salvation?