This post asked
why we can't (or shouldn't) seek the things that give us direct pleasure (like drugs).
Most people would think taking drugs is not worth doing.
On the other hand,
Epicurus believed that the greatest good was to seek modest, sustainable pleasure
So we can assume we should do things that are sustainable and not depending on the outside environment and things; it means the mind inside us.
However, how about watching the sunset, which people would enjoy and agree it's worth doing, even though it also gives us direct pleasure and not sustainable. Similar examples include connecting with nature, learning new skills, and so on.
I don't know how to describe it perfectly, but I was wondering humbly. After all, which things are really worth doing in life and which are not? How do we distinguish them?