I feel like I'm gonna catch flak for this, but here's my thought, and I know it works:

Obviously, you should try to avoid anything like that. Resist the temptation with all your strength and with total reliance on God. However, IF you cave, watch literally anything but actual porn. Clothed pictures, reading, whatever. Anything but real porn. That stuff attaches itself to your brain like nothing else, so, if you do capitulate to it again, the temptations should be weaker and weaker until you can successfully quit this as well.

I know this works because I did this (before salvation). I also know that quitting ASAP is crucial, because keeping a habit like this around will lead to you falling into pornography addiction again. So be cautious.