Slippery slope

Well, it's happening to me like it could happen to anybody who is careless.  I'm headed down that slippery slope.  After several months of maintaining at above my goal, my weight has slowly started to creep up.  I shouldn't really be surprised.  I've been careless about my eating habits.  It's hard to undo a lifetime of bad choices, and I shouldn't make excuses, but I do anyway.  I'm tired today, I deserve a treat.  Just one piece won't hurt. Etc, etc, I'm sure you're all familiar with the litany.  I should know what to do, but I'd like to solicit some advice.  How do you manage to keep on track?  218/208/138/115 4'11"

I think you are there with almost anyone else after all this time. You manage to keep on track by getting back to the basics: Protein firs****er and excersis. And when you fall off the wagon you start again the next day. This is a lifestyle that you need to keep working at, every single day.  It doesn't get easier unfortunately. You just have to do it.

Look at every day by itself.  Yesterday is done and cannot be changed.  This is a marathon, not a sprint.