Received via e-mail from Tzuriel Kastel of Parsha Parts:
And Yisro heard (Shmos 18:1).
It is fitting and appropriate to listen to one’s 'Yeser', that which remains from all his toil and effort in this world [the root of the name Yisro is yeser, 'remainder' or 'left over' - Yisro, his remainder]. Everything in the physical world is empty and meaningless. None of a person’s gold or silver accompany him to the next world. Only that which he gains in Torah and what he teaches his children about the path of goodness before the Almighty remains from his efforts in this world. It is appropriate to be aware of this constantly and direct one’s attention to it.
(Degel Machaneh Ephraim)
More teachings of the Degel Machaneh Ephraim on Parshas Yisro can be seen here and here.