It's not that easy, you say. Well, that's certainly true. It is not that easy to do stuff that does not come naturally. In your case, when the idea of lusting comes up, perhaps almost anything that comes naturally may be ill-advised. That's not easy.
If you really feel you cannot afford to keep doing it, then why stop? I'm not a rabbi. Maybe they can tell you why to stop. Heck, there are tones of reasons people here have pointed oput why "we must not spill seed"...and yet they themselves still do it when they really, really want to.
No, I am not criticizing them, for I am powerless over lust, no shayloh, no looking down at anyone by me, even while they are masturbating. I love you even then, for that's wher I could be. And Hashem loves you right then, too. Though it really is a pity...
So if you need to quit, then you will start to call people and talk with them about normal stuff instead of thinking about lust and masturbation. I have done that many times. Just call out to the guy down the hall when I feel I am about to burst cuz I want to get drunk with porn...and ask him how he is feeling today and how he feels about his job, for example. I did that many times at my work when I looked at the dirty magazines all over the place for too long and got lust-crazy. Hey - plunging ourselves into real life, especially someone else's with even just a molecule of genuine caring for just that moment - that has saved me in some of my very worst moments.
I have also asked G-d, "Please Tatty - whatever it is that I am really looking for in the masturbation or in that woman down the hall I want to stare at or in that porn over there that I feel I HAVE to look at or I'll just die - please let me find exactly that sweetness and comfort and beauty in You. And if you could make it in the next few weeks that'd be extra nice...thanks for helping me get over my desire to do this stupid thing, today." I say this calmly, not with fists stupidly shaking in the air - for He is G-d, not I - so He does not need to do this, and I have no way of forcing Him to comply and 'be nice". It's a free gift for no reason, that I ask for. And I expect that He will do it for me, period.
This tefillah may not be the best thing for it is also selfishly oriented, but sometimes I may need that approach too, for I just have to be selfish - I am still a big King Baby, you know. Nu.
It is good to be sober today.