The biggest barrier to learning to juggle, in my experience, is control. You need to learn to control with great accuracy the trajectory of every toss, so that the juggling balls fall predictably. Without control, you end up chasing your juggling balls around the room and quickly dropping one or more.
Control – mastery of the details – leads to consistent performance.
It’s the same with any skill, though failures of control might be less obvious than they are in juggling. Learn to navigate the passagio consistently. Master arpeggios and scales. Learn to speed read.
For me, the secret (as I remembered when my sons started learning to juggle last week) to learning control in juggling was forcing myself to miss. Whenever the juggling ball wasn’t where I wanted it to be, I refused to reach for it, letting it fall to the floor. That discipline enabled me to prioritize the control I needed to improve.
How can you force yourself to prioritize learning the control your skillset requires?