KonMari your time
Jason Fried makes a radical suggestion: maybe the solution to time management problems isn’t the traditional approach of organizing, tracking, prioritizing. Maybe the real problem is that you’ve given yourself too much stuff to do, and the best solution is to take things off of your to-do list until there’s enough time in the day.
I bet Marie Kondo of Tidying Up fame would approve. Don’t organize the clutter. Instead, eliminate the unnecessary. It has a beautiful simplicity. If you have too much to do, don’t do some of it.