It's a Danish word to describe a concept embracing a cozy lifestyle focused on curating contentment and well-being via simple joys and enjoying life moments.
We shouldn't give up apologizing altogether, of course. However, it may give us a moment's pause before we apologize to make sure that one is truly warranted.
One of the best ways to avoid getting stuck in our thoughts is to get out into the physical world. Call a friend. Have coffee with your brother. Go to the gym.