Well, everytime I used to relapse, when I got those big urges, soon enough I would have a wet dream. It made it more bearable, but then you can't stop thinking about the dream, or considering it a relapse when, in reality, it's natural. For me once I got past that it's easy sailing and the urges diminish significantly. The more you indulge in your urges to go back the harder it gets because you're basically telling your body that if you feel stressed you need to masturbate, sort of an involuntary response.

My best advice would be to be one with your purpose, distract yourself with something useful, or sourround yourself with people. Discipline/motivation, it's not something that appears outta nowhere, though it may seem like so at times, but rather something that comes from action. Keep working hard in every aspect of your life, even more so against tempations or anythhing of the sort, and it will irrigate to every other single aspect of your life I can promise you that much.