Two I'm very happy to share my experience but don't for a minute think I've got it 'right' in any way! If I had all the answers I'd have written a best selling book about it by now
I still live in a mental world of 'good' and 'bad' food, of fat days and thin, etc. but for me, I know I'm doing OK when I can see all of this objectively and not beat myself up about it, get it out of proportion, or have an emotional response to it. I remind myself that food is fuel, and its job is to keep me healthy so that I can live a long, happy, healthy life with my family.
I'm 7 months pregnant at the moment, and have freaked out in the last week at the amount of weight I've put on because (unlike first pregnancy) this time I've used it as an excuse to eat as much chocolate / cheese / butter as I like, without beating myself up. However I've just reached the tipping point of knowing that if I don't rein it in, I'll feel awful when I've given birth and will want to diet.
Now, for me, a 'diet' is something I can never do again - it's too dangerous. The control issues come back and I start to get a kick out of not eating, obsess about how much weight I've lost etc. So I have to catch myself before I get to that point and think "OK kiddo, rein it in" so that I can cut down (not out) the 'bad' foods and focus on what I AM eating (healthy foods, low GI, wholegrain, lots of fruit & veg, lean protein, organic / local, fresh, well balanced meals etc) rather than what I'm not.
Sorry if I'm rambling!!
The biggest thing for me, I think, in 'managing' an ED is breaking the connection between food and emotions, and that comes through self-awareness and unflinching honesty. I know if I'm eating because I'm bored / pissed off, and I admit it to myself. I know if I'm being 'silly' (2 toblerones & a wispa in one go) and admit it to myself. Then I think "What's that all about then?" and deal with the emotions that are the problem - the food is ALWAYS the symptom - in a healthier way whether that's talking to a friend or writing in my journal to get some clarity.
Yes, I like to look nice, and I'm always happier with how I look when I'm a size 12 rather than a 14 / 16, but equally, I know that being thin doesn't make me happy - more that when I'm happy, I happen to be thinner, because I'm not self-medicating my emotions with chocolate / cake etc.
I hope that makes sense - I guess in a nutshell what I'm saying is that 'managing it' is about managing your emotions and dealing with them in a healthy way rather than trying to silence them or make them better with food (or lack of, which is just as addictive.)
The most important thing is to be honest with myself, and I know that I will probably have that voice saying 'you've eaten too much, you're fat, you have no self-control' in my head forever. But these days I can tell it to shut up, if it's talking bollocks, or sometimes, hear what it's saying, admit that it's right (if I've been overdoing the toblerones on a daily basis) and do something healthy, balanced & sensible about it rather than going from one extreme to the other and reacting by not eating for a week.
EDs are the hardest addiction to overcome. Try telling a heroin addict they can't give up their fix, but instead that they have to have 3 well balanced hits a day.
It's not easy, but it's do-able. It comes down to self-awareness, self-honesty, and recognising that it's ALL about emotions & self esteem - the food / weight are just symptoms, not the problem. When you can deal with your emotions & self-esteem in a health way, food just becomes enjoyable fuel again, rather than the enemy.
Sorry for writing 'War & Peace' here, but you did ask...!