I'm close to 200 days, but I feel I can provide some feedback.
For me it was responding to a certain circumstances that occured, were recognized and I used them to my advantage.
I always needed a strong push to start another long streak. This time it was a new relationship that started "getting serious" sexually right before I went for a three months long trip abroad alone, without her.
This was an opportunity because of a number of things:
1) I would be in a relationship, so hooking up with local or travelling girls would be off the table
2) I would be in Central America having adventures and time of my life so I'd have so many stimuli I wouldn't even need additional stimulation.
All in all it was the perfect opportunity to go full hard mode. I wouldn't get bored and sit on the internet or MO before bed (I'm not that kind of a hostel guest...). I wouldn't go to Tinder.
I made a promise to myself I would not touch my dick in any circumstances unless cleaning or peeing and so it began... And it was surprisingly easy. After a month I added some kegel exercise.
After three months I went back to my country, to my GF and to regular sex. And although I still use sildenafil pills I'm not going back to porn and I'm not giving up.
Hope you can use my experience
Cheers!
Wabba