How do you chunk down what feels like Mount Everest?

I have way too many things on my plate. It’s like I went to the all you can eat buffet and brought a pick up truck for a plate. Consequently, my life right now is a total mess and I’m responsible for three other peoples lives and finances as I’m their guardian for that. Every time I start to try and attack the mountains I may get a little bit done and then feel so exhausted and overwhelmed that I go to sleep. Anyone have suggestions or help? Thank you.