Read easypeasy (easypeasymethod.org)
Focus on your vision in life and go after it. Porn is a kind of pleasure and when we suffer because our lives are meaningless we use the pleasure as a buffer against the suffering.
Find a meaning to sustain you so you. If you havent already, reading easypeasy is a very valuable tool to quit initially. After that you have to consciously go after your dream to fill the void porn left behind.