Like all drugs, stop all sexual activity is difficult only in the begining, this period can take 2-4 weeks, depend on your past sexual stemulations. Less you do, less you want. It's a rule.
More dificult is "dream time", it's difficult to avoid "sex" in dreams, and it's very impotant, because sex in dream can break all your effort in daily practice.
To avoid this, you have to develop good habits in your daily life.
Avoid and cut off, at the very begining, all potential stimulations, all vidios/images/tv/mental formations abandon them without waiting. By developping this habits/good reactions you will also avoid all attacks of Mara's daughters/sons in yours dreams.
Also, you have to maditate on 32 parts of body.
Develop concentration, establish your mindfulness, and purify your mind by equanimity.
After some time, even if you "break" at some moment your avoidance of sexual activity, perception of orgasm will be neutral, like urinating, at this moment your practice of celibacy will become easyer, because you will see at your own that there is no pleasure in orgasm.
Also, when envy will arose in your body, if you establish your mindfulness rightly, you will see this "envy" as-it-is, and you will see that "senxual envy" have exactly the same characteristics as "hate", so you will abandon it naturaly without interpretation or following or suffering.
It's a very good and difficult practice.
If you want you can add to this sexual avoidance practice, a practice of one meal a day and/or practice of getingup at 3-4-5-6am every day, it would be better, because IMO these three "ascetic" practices are depend on each other, and you will see your concentration / mindfulness / equanimity / stillness / peace improove.
Of course, all this practices have virtue and morality at the begining, without virtue/morality it will not works because your mind will not be in moral peace.
There is also MN 13 and 14 Great and Small Discourse on Mass of Suffering.
I'am sorry for my english, i hope you understand.
Metta and good luck!
Last edited by Martin Po
on Thu Jul 11, 2013 7:44 pm, edited 1 time in total.