You should be wary of fighting a two-front war, yet you probably do so every single day in the form of multitasking. When discussing intuition in Chapter 1, we explained that there are two types of thinking: low-concentration, autopilot thinking (for saying your name, walking, simple addition, etc.) and high-concentration, deliberate thinking (for everything else).
Chapter:
Spend Your Time Wisely
Section:
You Can Do Anything, But Not Everything