Getting Things Done: The productivity technique. If you read one book, read this one. You will learn how to deal with all the stuff around you without being overwhelmed.
Atomic Habits set you up for success.
Pomodoro Technique: 25 minutes of uninterrupted work. Then a five minute break and back to work.
Envelope Budgeting to manage your finances.
How a password changed my life: How often do you type your password? What if it would remind you of your goal?
Take a Nap! Change your life: Taking a nap works better (and is healthier) than drinking coffee.