I have posted about binding and loosing before, but I just found this cool website called First Fruits Of Zion.
The teaching of Matt 16:19 and Matt 8:18,19 about binding and loosing is still very problematic for the church. Truly, Jesus is not teaching us to bind and loose Satan. In this sense, these passages are not about spiritual warfare. We have much authority over the demonic realm, but that is not what these passages are about.
On the other hand, there is an aspect of binding and loosing that is related to spiritual warfare and that is the power of our words. Our words hold the power of life and death. What we come into agreement with (believe in our heart) and confess with our mouth can either bind us to the truth of the Word or loose us from it. Our words can either bind us to the power of life and healing or it can loose the power of death and destruction. We must bind our minds to what is true and right and loose our minds from lies and deception by taking every thought captive to the obedience of Christ.
If you have a moment to watch this video or poke around this website, I think you'll find it interesting.