In our world of excess, people tend to go way over board.Something our grandparents, would never be able to get their heads around.
It would seem that there is now a few people around, that enough...will never be enough.
For me, how I know is to make sure,I never cross certain boundaries.
That means in all things...Some people become greedy,some become obsessed.A person must set 'limits' and do not go outside of that limit.
It use to be a normal instinct,but because more is best...people loose their way.
Family & friends can be a huge help, we often may not see the obsession.
I think for certain things like losing weight its good to stay goal oriented and when such goals are achieved, they should be celebrated and stuck to. T
Similar for aspirations; make goals and stick to them and once they've been achieved, celebrate that. Obviously once goals are attained, new ones inevitably take their place but its useful to keep in mind what you are really striving towards and not be become obsessive in terms of over achieving or getting too tunnel visioned on a goal that could (and should) take years to achieve.
I'm a fan of celebrating small wins and personal victories so that I stay mindful of the journey I'm on not just the end game. This is totally true in my family life e. g where my son is learning to read...I've celebrated letter recognition, singing the alphabet and everything in between....I'm not saving my praise until the first time he reads a novel. It's natural to want more, but it should also be natural to acknowledge what you have and all you've done to get there.
Having a minimalistic attitude is the way to knowing when enough is enough. I've recently got into the 'survival mode' where I try to be prepared in case society is going to collapse. This way, I only keep 1 of 1 item, so that there's not much to part with/waste time making decisions of keep/toss about. As long as 1 is enough to meet all your needs and requirements, you should be good to part with clones of it.
You know as soon as you're tired and burnt out. I have ditched materialism ages ago. I'll be cleaning out the house again tomorrow - to sell more stuff and give more stuff away. I've found that by buying less you have more of a life and don't need to work less. That way your health and relationships don't suffer. Seriously, do you really need another necklace? The answer is generally no - trust yourself.