I recently read a book that I love: Four Thousand Weeks: Time Management for Mortals by Oliver Burkeman.
I've read a lot of books on productivity, and this is by far one of the best I've read. Because it takes a completely different approach to our view of time and how to get things done.
In this episode, I go through a tactical list he includes in the book about 10 Tools for Embracing Your Finitude. I hope this helps you as much as it helped me.