In place of Satan finds..... I know of " idle mind is a devil's workshop." I think this applies to the mind that remains idle most of the time. Even machines require rest. Giving mind some rest by keeping it idle works like charging battery. It performs well.
Wife asks husband "What are you doing? He replied "Nothing"
Wife asks further "That is what you were doing yesterday"
Husband replied very intelligently "but I couldn't finish it yesterday" When mind gets rest, it works intelligently and creatively.
I have hearing disability so I cannot watch TV or talk on phone. So. mostly,multitasking is not for me. While food is being cooked, I do dishes or something else. This beautiful article will remind me to be more attentive at what I am doing. I think, multitasking is prone to make more mistakes.