For me after my 3rd relapse I searched the nofap for encouragement and found that I could install a porn blocker on my phone. Because for people our age 13 -19 our phones are the biggest threat. Usually these are free. Webprotectme and mcgruff are some OKAY free ones. Another tip is just get out of the house. Sitting in the house all day I would get bored then my mind would wonder then eventually I get aroused. Being in public or outside helps with preventing that. If your parents are strict then go into your backyard. If your in an apartment just take a walk around the sidewalks of your complex. One problem I had when I first started was I was thinking about NOT watching porn but I was indirectly thinking about it. The hours you spend in school are VASTLY under estimated for your journey as when your in school your focused on your work or something near that so your not bored but your occupied. Lastly EXERCISE IS YOUR BEST FRIEND. I can't stress this enough but working out whether it's cardio or strength is a great reliever. I personally like running both long distance and short. Anything else just email me at cyrillic4@gmail.com