4 simple keys to productivity

I'm reading a beautiful book "Barking up the Wrong Tree: Why Everything You Know About Success is (Mostly) Wrong". The author proposes the following simple keys to be very productive, drawing the lessons from stoicism. Here we go:

• Protect your time like your money: You can get more money.
• Manage emotions to better manage time: Feeling too cranky right now; I’ll explain this later.
• Important beats urgent: Getting a lot of unnecessary things done is not productivity; it’s stupidity.
• Focus on effort, not outcome: You can’t control whether it ends up as a “robbery” or an “attempted robbery”, just focus on executing the heist in a way that would make mom proud.

You can read more about the above here (same attached).