In his book, Essentialism: The Disciplined Pursuit of Less, Greg McKeown lays out many tips for how to create processes for determining what activities are absolutely essential in your life and eliminating everything that's not. This focus gives you space to do the things that matter really well.
I love a simple filter he suggests to help prune projects. Ask yourself, "If I didn't already have this opportunity, what would I do to acquire it?"
Want to go more extreme? Rate all your activities from 1 to 100 on how effective they are. Then eliminate the bottom 90%. Yes, 90%.
But, today, let's start small. What is one thing you can stop doing that isn't essential? What would ending that open up for you?