The simplest way to think about this is with food: Eating until you are fully satisfied is enough. At that point, it's best to pause, think about whether you are satisfied, and stop if you are.
The most important way to think about this is as a consumer. Each time we want to purchase something, we need to stop and consider whether we are already satisfied. If so, we can move and not make the purchase. I love thinking about buying in these terms, because there are times when I'm actually not satisfied, and those are times when I am most happy with my purchase! If we can learn to only purchase when it will actually help us reach satisfaction, what a nice way to live life!
There are lots of other ways satisfaction is important, and I'd like to start making a note of them. For instance, last night S and I got out of the house for a while to stop by and see some friends. We were having such a nice evening that we completely lost track of time! For once, I didn't feel bad leaving, and was in such a good mood when we got home. Usually I hate leaving, but for some reason I was completely satisfied having spent a few hours having a hot dog and playing cornhole with some friends, and was happy to go home with my hubby.
Hopefully, recording these moments will influence me to pause more often and think about how nice it feels to be satisfied.