Reduce your working time.
The only way to gain more free time is to reduce time spent on work. What’s more interesting, you may accomplish the same amount of work when you do it. That’s Parkinson’s Law. By combining it with Pareto’s Law, you can be even more effective—do more in less time.
Reduce your working time in order to accomplish all your tasks faster.
This will cause you to do tasks faster and also limit yourself to doing the important ones.
Use this law on a micro level.
Set short deadlines for each task.