Find your tribe in a Sea of Creativity
It's true that you shouldn't stay in the "fuck it, whatever" mindset after a binge - food-wise, anyway. You most of the time can't make up for binges - physically, again. But you can stay out of the "my day is ruined and I'll wallow in self-pity for the rest of it" been there, done that.
But honestly? That's NEVER worth it. So why not make use of the energy - and not by working out or trying to make up for it, because that's not gonna happen and because it doesn't work, you'll feel even more it was a bad day. No, try to do homework, a creative project, sit down for video games or movies, whatever. Something to distract you and that makes you still think by the end of the day, that even if you binged, you had a great or productive time and so that you can end it on a good note.
I get that it's difficult, but chances are high that due to this disorder, you neglect other thing which were once important to you - so see that as a way to make up for that, even make up for the binge in a different way if you want, but make it feel like you still spent your time with something positive, that wasn't for nothing by the end of it.