I want to share my personal experience, which could sound motivating or not.

When I decided to drop out Internet pornography I started a 30 days no masturbation challange. I failed many times, but in the end I kinda achieved it. It was not completly avoiding masturbation, since sometimes when I was lying in bed I started to swing nicely, and some other times I let my hand move a bit... by the way I had been able to take control back every time and I spent 40+ days without an orgasm, beggining on the end of October 2013. I also haven't had sex during those days (unfortunatly).
It has been a very strange period of my life. After the first week or so I was practically unable to sleep and I spent my time recording strange improvised tracks with my instruments in my garage late at night. Past emotional issues aroused in me during that time, but it was too early for them. Months later I was still suffering remembering the pain I felt and I seriously decided that, if I had been 40+ days without an orgasm, I could become asexual. Failed in this of course.

Currently I feel completly fine masturbating, also frequently Sometimes I got caught back by porn again, but now I absolutely don't need it and I nor remember the last time I saw a porn video