Thank you all for your kind words of support and especially Momo, since there's nothing like a rainbow to brighten up the day.
(Well not a real one... Floods are not fun, nor is G-d's desire to bring them)
To R' Kollel Guy; the conversations with my y"h are not exactly voluntary... It's more of like some shady man in a ratty trenchcoat walking out of the blue into my path and saying "Psst! Hey you, kid! Would you like some endorphinal satisfaction?" and then proceeding to block the path out. I've got to smooth talk my way past him.
As to the plan of action: yes, I have one that involves various things like walking out of the room and engaging myself in reality for a change. Generally speaking I tidy up. A clean room leads to a clean mind. (Not that keeping my room or my mind clean is an easy task. In fact, I probably have more success in keeping my mind tidy than my room...).
Also, to silentbattle, I do have a plan of healthy (or relatively healthy; many are done while sitting in a chair) activities to engage myself in reality rather than fantasy. Also, I like reading books (provided they don't have any objectionable parts) since regular fantasy is actually a lot more appealing to me than the other kind.
Yet still, I don't have an answer to my question, probably since I didn't express myself lucidly. I will try to phrase it a bit more clearly now. By means of explanation: I am blessed, thank G-d, with youth and good health, which leads me to sometimes have no need for outside stimuli to become entrenched in bad thoughts. I have, in days of rather awful insanity, found, I kid you not, trees and tables to be arousing. If there are any more vanilla objects to look at (except perhaps a brick wall), I don't know what they are, and closing my eyes is probably a worse option. These days, by my estimate, I have a 50%-70% chance of falling. I literally cannot control myself. Such days do not happen often, but when they do, is it acceptable to take upon myself for a given span (in this case, until Pesach) to allow myself to fall physically when extremely tempted instead of risking falling visually as well? I cannot trust myself in such situations, and I do not want to fall into viewing p***, which will almost definitely lengthen the fall cycle. I will continue in this fashion until Pesach, or perhaps 50 days (a point at which I have determined by my previous clean streaks that it is actually difficult for me to resume viewing p*** (though I ended up doing it anyway)) at which point I will try to avoid falling in all situations. The point of this endeavour is to "divide and conquer" the addiction by doing away the part with which I'm not as tied first, thereby removing the roadblocks to removing the second part. Is this acceptable, or must I fight for all or nothing??
Well, that was quite lengthy... I hope someone has the patience to read it all...