What focus means

Do not let little things upset you - Dale Carnegie
At its core, this is about emotional energy management. It's a directive to stop spending your finite mental and emotional resources on events that are, in the grand scheme, trivial and forgettable.

Wise advice on focus

Count your blessings, not your troubles - Dale Carnegie
The core message is about a deliberate shift in attention: from what's wrong in your life to what's right. It's a command to audit your focus, not your circumstances.
Keep busy the worried person must lose himself Meaning Factcheck Usage

Wise advice on focus

Keep busy, the worried person must lose himself in action - Dale Carnegie
The core message is that action is the antidote to anxiety. You can't actively *do* something and passively *worry* at the same time; it's a neurological impossibility.

Boundaries Quote

Decide just how much anxiety a thing may be worth and refuse to give it more - Dale Carnegie
This quote is about assigning a conscious value to your worries and then sticking to that budget, refusing to let a problem consume more of your peace than it deserves.

What focus means

Live in day tight compartments - Dale Carnegie
It means to deliberately confine your focus and energy to the present 24-hour period, sealing it off from past regrets and future anxieties like a watertight compartment on a ship.