This particular Yetzer Horah is often agonizingly difficult to overcome. The reason is not merely because it is so strong, but also because whereas by other Taavos - such as Kovod, money, and power - you can enlighten yourself into a state of victory over the Yetzer - you can learn to laugh at Kovod; to be a Someach b'chelko; and to not care about power - there is no philosophy, no enlightenment, and no proper attitude that will cause you to not care about this Taavah.
The only way to fight it is with simple self-restraint. That’s why "Kedusha" means staying away from this specific Taavah. You have to simply "say no" to this Taavah; for the others, you can simply learn that there is nothing there that you even need to say "no" to.
Your first course of action is to make Gedorim and Siyagim. Keep the computer in a public place if possible; allow others to use your computer when you’re not there (you may be afraid that others will see your "trail." And btw, its not only the Temporary Internet Files that show where you’ve been. Even if you erase those, there are still ways to see your history).
After that, you need to realize that the only way you can get of this is simply by fighting the urge to do it. Tehillim helps of course, but just like Tehillim helps for a sick person. Meaning, you still have to go to the doctor. Here, you are your own doctor, and your self-restraint is your medicine.
There is one "trick" that I have suggested to people that sometimes helps. The way this particular Tavah works is, you constantly need to refresh it with new images. There is so much available that the Yetzer Horah is always making you look for more, and it makes you bored of the same old thing after a very short while. So if you limit your Yetzer Horah to a small amount of images, using only them and never going for new ones, it will eventually become boring, and at that point it will be easier for you to break away from the whole thing.
At this point I must clarify that I am not allowed to, nor do I have any intention of, telling you to look at this stuff. Rather, I am merely advising you to reduce and limit what you are looking at already, in order that it will be easier to break away totally.
Please understand also, that even though the situation looks and feels bleak, with much effort and much prayer, Hashem can give you Siyata D'Shmaya. You never know where - and when - Hashem's salvation will come.
You are fighting a very tough battle. The main thing is to keep fighting and not give up. Hashem is the one who decides what our Nisyonos are, and how hard they will be. He is watching you fight this battle, and Shepping Nachas from your efforts. It is those efforts that makes Hashem proud. And the energy that you put into those efforts is what brings Shefa and Brachah to then entire world.
In a time where Klall Yisroel needs Shefa and Brachah so desperately, the efforts you are putting in to fighting this Taavah are so important to us and to Hashem. Please, for all of our sakes, keep on fighting.
The best of the "segulos" is accessible to you: "ain segulah katorah"!
"The nature of our holy Torah is that it burns up and incinerates all evil thoughts and impure ideas."
- Keren Orah Moed Katan 28
The best solution is to immerse yourself in the Mikveh of Torah.
