It's good that you are admitting that you indeed have a problem. You are seeking help and you aren't in denial about it. Most likely looking at porn and mb, just brings on more and more shame which will make you feel so bad about yourself. Here is one link that will help you understand why porn is so addictive.
www.yourbrainonporn.com

Another website that is very helpful is

www.fightthenewdrug.org

Understanding it is the first step to overcoming it.

To second what shana1254 said, yourbrainonporn.com was very helpful to me -- particularly in the recovery model it provides through the 90-day reboot (going 90 days without pornography or masturbation and, for many people, sex). It also has a forum Web site, yourbrainrebalanced.com, which provided me with much-needed support.

Then there was a book, "Breaking the Cycle" by George Collins, which helped me see that I didn't have to let my urges control me.

My feeling is that pornography and masturbation addiction are kind of like the old experiment with Pavlov's dogs, who would start drooling at the sound of a dinner bell even if no food was offered, simply because it was a conditioned response.

You've conditioned yourself to respond to momentary urges by using pornography and masturbating. And, since those are inherently unsatisfying activities, you are probably left with a feeling of dissatisfaction each time you indulge, making you want to try something more intense the next time. The 90-day reboot helps you re-condition yourself so that you can let momentary urges pass and focus on whatever is truly worth pursuing in your life.

Thank you both for your advice, I will look into it more. :)