Do you realize you put so much into just keeping busy there is no time or energy remaining to really live? Yet in reality, being overwhelmed by all you must do is purely a product of the thoughts you have.
Understand that feeling of being overwhelmed comes from worrying about what you must do next. Just stop. It is of no use to you to let your anxiety for all that needs to be done intrude into each moment.
Beginning today begin to see your life not as overwhelmed, but rather as filled with productive and enriching activity. How? Stay focused on the present moment and that feeling soon fades quickly away.