Just worried how I will cope without a specific "goal" other than simply "want to stay slim and healthy", although you'd think that'd be motivation enough in itself really. :sigh:
Well, you would. But it often isn't. After all, if you pigged out tonight, would you stop being slim and healthy? Nah. Even if you pigged out every day this week, you'd still be okay...but that's not what you want.
You know how people say "one of those isn't going to make you put on X stone". Very true, but I remember thinking that I wish it would. I wish there was more punishment to motivate me to keep focused.
That's why I think it's important to make life style changes. I don't control my weight. I made changes that I enjoyed and my weight controls itself.
I don't eat to control my weight. In fact, I do very little to control my weight.
The weight is a symptom of the problem, not the problem itself.
Now...if you are trying to motivate yourself you stay slim, you may still have work to do on dealing with the problem IYKWIM. Though admittedly working on staying slim is probably wise at the beginning.
Anyway...for example. I've always loved walking, but gradually started connecting walking with calories burnt. That seems normal doesn't it? But, it occurred to me some 30 years later that though I loved walking, I rarely did much when I wasn't 'dieting'
That's because it had become just a weight loss tool. If I wasn't dieting, I was off diet which meant I shouldn't really do anything 'healthy'

Yeah...weird.
I walk a lot now, just because I love to walk. It has nothing to do with burning calories, or punishment for overeating. I just love walking. I make any excuse to walk. I found a lifestyle change that suited me that now has nothing to do with food.
So if I have days when I feel fat, I don't feel that I should have to go for a walk. I'm not disappointed if my walking doesn't show something magic on the scales. I'm not tempted to overeat knowing that I can make up for it. I know all these things can be crooked thinking for me. More importantly, I don't have to motivate myself to go for a walk.
I just walk because I love walking.
That's just one example
