• Getting Things Done: The concept of "next available action" was eye opening. Always knowing what the next task is you can work on for any given project. Also the requirement of a task starting with a verb. So instead of just "laundry" I'd say something like "select clothes to put in washing machine". Even though I know what "laundry" means, having it be more concrete helps actually doing it.
• Thinking Fast & Slow: Helps you become more aware of all the common mistakes our brain make.
• The Creative Habit and The War of Art: Both taught me you don't need "inspiration" to do creative work. With good habits and discipline you should be able to do creative work anytime.
• The Effective Executive: No-nonsense advice on how to be a more productive executive.

I read these books quite a while ago. Many of them I wouldn't enjoy today, but they worked for me in the moment. I recommend just getting the free chapter on iTunes/Amazon and if you don't enjoy it try again in a few years.