How do you keep going strong when you relapse?

Remember how that made you feel and anytime you ever think about doing it remember that pain and sadness you felt and associate that with why you do t wanna do it. Also don't try and not do it, run from it. If you're feeling tempted go do somthing else, you do it when you're bored(at least that's when I do it) try and never be bored and always be doing something.