Even though we think we're getting a lot done, ironically, multitasking makes us demonstrably less efficient.

Workers in government, the arts, and industry report that the sheer volume of email they receive is overwhelming, taking a huge bite out of their day. We feel obliged to answer our emails, but it seems impossible to do so and get anything else done.

Multitasking creates a dopamine-addiction feedback loop, effectively rewarding the brain for losing focus and for constantly searching for external stimulation.

Daniel Levitin Quotes