Upon practicing recently, something re-occurred to me. When I was younger, I learned that practicing was largely about seeking out and eliminating the negative, always striving for cleanliness.
You know what I am talking about... the old adage of "Practice makes perfect" ...or even "Perfect Practice makes Perfect."

I am saying this is an inefficient process, and I am also saying this process is downright destructive.
While noble on paper, this approach actually teaches us to "accentuate the negative." This "seek and destroy" method creates an outrageous habit of microfocusing. While the intent on perfection is noble, to worry about perfection is, in my opinion... excruciatingly NON-musical.
Please allow me to digress...
Performance should NEVER be about perfection. Ever. Even the best performances have imperfections in them. Accept and embrace this fact NOW.
One of my strengths as a performer is audience communication. I feel that my singular job as a musician is communicating the intent(s) of the music. The more I play, the more I believe that simply, music is simply a form communication.
I know for a fact if I am concerned singularly with perfection or it being the top priority, the communication is not going to be as effective as it could (or should!) be. I am “in the wrong place” if I am focusing on what is right or wrong.
Am I saying give up mastery and be sloppy? Of course not. We should all naturally strive to maximize the execution of whatever music we are engaged in.
What I am saying is that is Practice Makes PERMANENT.
...meaning the intent you practice with will be the intent you perform with.
When we practice, we not only work out technical issues and train our bodies to execute certain processes, we ALSO (and perhaps more importantly) train our subconscious. In every process we go through in practice, our subconscious not only records what we do, it records how we go about it, it records what we really intend, and it records how we feel doing it.
AND when in the heat of performance, without fail, the subconscious reveals its power! You can't control it and you can't fight it. You must learn to embrace it, as IT is what drives the performance; not our conscious analytical side.
Now without opening a separate can of worms, let me suffice to say that when you practice, you absolutely MUST train your subconscious.
We do this by being honest with our method, and always keeping the "communication of performance" in mind and playing everything with a solid and clear musical opinion.
Practically and literally, I am suggesting the performer start by focusing on what is RIGHT with their playing, not what is wrong. Take what is right, and expand that. Be specific.

I am not suggesting the common pitfall of only working on what you already know... I AM suggesting however that you always try to build on what you do know and already do well... push your limits outward always. Don’t focus on eliminating imperfections themselves, rather focus on a clear vision and the correct organic approach to make the phrase that contains said imperfections. Slow the WHOLE lick down and work it out, all the while NEVER forgetting about where the lick goes and how it relates to other licks. ...this step is CRUCIAL!
Work out imperfections through INTENT. Ask why does this imperfection exist? Often times, you’ll discover that an imperfection exists not because of incorrect technique or execution, but because of malfocused or undefined intent. Give every note meaning.
Shedding a lick is great, but always keep the big "performance" picture going. Where is the music going? What's its intent? Why is it hard for me? Often the music itself will answer the questions.
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Our subconscious is (and in my opinion should be) our default in performance.
My best, most memorable, influential, and rewarding performances are without exception, ones where I can calm my conscious mind, so it can be clear and decisive, and open the door to let my subconscious (instinct) support and guide me through it.
It’s not “muscle memory” (I don’t like that term) It’s the opposite actually, where once our instincts are correctly trained, they can guide us, and our conscious mind can execute the required processes without constant reevaluation or judgment.
Train your default to be solid and consistent, train your subconscious to be confident, and your concious to be simple, concise and non-judgmental.