Number 4: be content.
I mean this in the broadest sense. Be happy with where you are and what you’re doing, Sure the grass may be greener on the other side, but there is always something to be glad about.
Sure there’s a lot left to do before you die, but for now perhaps you should just lie in the grass and think of the things you have left to do.
Aside: Strange that contentious has content as it’s root, no?