Zach, what others pointed out is finding something else to do with your time. This is what can help you get away. What are the reasons you use a computer anyways now? Also are you watching tv shows that you enjoy but know you shouldn't be watching them? Here are somethings you could possibly do:
- Exercise(this is the biggest thing I keep myself busy with waiting for my mission, to make it fun, set goals like getting a certain amount of strength, your dream body, running mile in a certain amount of time,etc)
-Sit down and use a big piece of paper and write down all the things you can think of that you can do and hang it write next to the computer(usually we are tempted cause we start getting bored)
- Get a job(helps take away a big part of the day with some money for your mission like me)
- This is a weird technique but sometimes it really can help, just when the temptation pops in your mind, just YELL. It seriously works, just yell out No or something. It totally gets your mind focus and your body worked up leaving you back in control.
- Self Control, its all about controlling yourself. Its hard to start with porn, but try something easier at first, like what you eat. You know you want to eat that donut but you know its bad for your body(temple of god).