Using a porn-blocker will help.
A lot of people use K-9, it's free:
http://www1.k9webprotection.com/
If you are really serious you can employ is an accountability partner. This is free one:
http://www.x3watch.com/x3watchfree.html
Also, find some forums where you can share your story and get advice.
Here's an excellent presentation, by a science teacher, on the effects of pornography on the brain. It is non-religious, non-judgmental, and science based.
Your Brain on Porn - Porn Addiction: 6-Part Video Series
http://yourbrainonporn.com/your-brain-on-porn-series
Here are a few articles -
Porn Then and Now: Welcome to Brain Training
http://yourbrainonporn.com/porn-then-and-now-welcome-to-brain-training
Intoxicating Behaviors: 300 Vaginas = A Lot of Dopamine
http://yourbrainonporn.com/intoxicating-behaviors-300-vaginas-a-lot-of-dopamine
What Porn Users Taught Me
http://yourbrainonporn.com/what-porn-users-taught-me
Why did my porn use escalate?
http://yourbrainonporn.com/why-did-my-porn-use-escalate
This is an excerpt from the popular book - “The Brain That Changes Itself” - that explains how Internet Porn can rewire the brain:
http://yourbrainonporn.com/doidge-on-pornography-and-neuroplasticity
Here's a pretty good wiki page with lots of suggestions:
http://www.wikihow.com/Avoid-Pornography
Knowledge is power,
good luck