Eat That Frog! by Brian Tracy
I've found it hard to get past the first few chapters as I'm actually trying to implement the advice. Planning the day the night before and constantly asking the question "Am I doing the most important task to achieve my goals?" during productive hours has been life-changing in actually making progress towards my projects, but also rather stressful. Perhaps I'm in the minority, but I procrastinate a lot by doing busywork- organization, cleaning, responding to lower priority inquiries, researching tangential things to the task at hand, etc. It's been a difficult habit to break