It sounds kind of crazy and I don't know your living situation or if it would be practical for you, but for greater than a year, I had signs in my bathroom over the toilet that said things like "walk away", "you don't want to do this" etc.

I also agree with the poster who suggested keeping your hands busy. I personally took up knitting and DIY decorating crafts I found on Pinterest. For me, when the urges are really strong, I just have to leave the situation - go for a walk, go to a bookstore, the library, a friend's house, even just a drive, something to get me out of the situation.

They say urges are like waves and studies show they last approx. 20 minutes. So if you can tell yourself to ride it out for 20 minutes, the urge will likely dissipate or at least lesson.

for a while, I also had a list of "alternative things to do" posted in a prominent place in my house- read a book for fifteen minutes, watch a movies for 15 minutes, knit for 15, work on e-mail, work stuff, a project, cleaning, going for a walk, for 15 minutes. Whatever distraction techniques work for you. I had an agreement with my therapist once I was out patient that if I did three of the things on my list and still wanted to purge, I had the green light. This may not work for everyone, but for me, it gave me some control back, I didn't feel like I was losing so much of myself and probably 90-95% of the time, by the end of the three activities, I no longer wanted to purge, it had passed.

I don't know if any of this helps, but I hope something does. I know how hard it is to beat those urges.

Hang in there.