Just like the Israelites had a territory to conqueor in Joshua and Judges, we have one as well.  Ourselves.  That is the hardest thing we will have to conqueor in this life.  There are lots of things we can look at and learn from the story of Joshua and Judges but maybe the prime one is this.  The last verse of Judges sums up the problem.  "Everyone did what was right in his own eyes."  Strive to move beyond yourself and do what is right in the eyes of God.