Here, in summary, are eighteen facets of importune prayer that I have written about in my book Principles of Prayer.  Importune prayer… 

1. is an appeal to the friendship of God for our friends.
2. goes beyond friendship.
3. keeps asking with a shameless boldness.
4. keeps increasing in intensity.
5. is never discouraged.
6. is prayer that would wear out and trouble any person of this earth.
7. is prayer at all times, even in difficult times.
8. is prayer that cries out in desperation for an urgent need.
9. persists in asking even when God seems distant.
10.  is always with great faith.
11.  is prayers that is made out of a genuine concern for its object.
12.  is prayer that has a concern for righteousness and for God’s reputation.
13.  is prayer with a fearless boldness.
14.  is motivated out of a fear of God’s wrath.
15.  has a sacrificial passion and love for people.
16.  is prayer that has an…