Chiropractors who only work from one side of the bench.
Music students who use the same practice room at the same time every day.
Runners who follow the same route every training run.
People who park in the same parking space every single day.
What do these people have in common?
They’ve fallen into a groove.
“The brain becomes used to thinking in a certain way, it works in a groove, and when set in action, slides along the familiar, well-worn path.” 
Grooves can be good. They help us to get through every day of our lives – they speed up decision making and get us through our days faster. But…The problem with the groove is that, while you’re in it, you’re not thinking hugely effectively. You may be following an established protocol very easily, but you won’t necessarily have analysed whether that protocol is really best for your needs. Sometimes your protocol will be sound, but at other times it will be staggeringly inappropriate, and you’ll be too busy in your groove to notice.
For example, it may look like a time saving measure for a physical therapist or chiropractor to stick to one side of the table for making adjustments on patients. They don’t have to move as much, and they get really good at adjustments on that side. But it comes at a price: they risk being less comfortable if they have to work in a different space where they are forced to use their ‘wrong’ side. And they risk muscle fatigue and injury to the side that is working harder.
Similarly, the music students I work with tend to love the routine of just block-booking a practice room as far into the future as the computer system will allow. They book the same room, and the same time. It gives a rhythm to their day-to-day life, and makes practice as normal a part of the day as eating or sleeping. But this also comes at a cost. When these students come to do recitals, they have to perform in very different rooms at different times of day. At a time when they already have the pressure of grading, they also leave themselves open to the disorientation of new spaces and different circadian rhythms, a new acoustic, and a lack of the environmental cues that helped them to memorise their pieces. The added load from all these new stimuli can be enough to hinder them from performing as well as they could.
Nonplussed by the unexpected
FM Alexander knew this only too well. In his first book he recounts a story of a young man who had been given an introduction to one of FM’s students, a prominent businessman. The young man hoped for a job, but was stunned when the businessman shouted at him, “What the devil do you know about business?”
“Of course,” the young man continued, “I was so unnerved that I could not even collect my thoughts and I was so flurried that I could not answer his further questions. He told me he hadn’t any position to suit me.” “My dear young man,” I remarked, “why did you allow Mr. —– to insult you? Why did you not remonstrate with him …” “I was so upset by his sudden attack, and I didn’t expect to be treated in such a way.” “Just so,” I replied, “you were nonplussed by the unexpected. But I hope this will be a lesson to you. Mr. —– was only testing you, and he wants men who are capable of dealing with unexpected events and situations in his business.”
We need to be ready for the unexpected. We need to be able to deal with stimuli that could cause fear, and the way to do this is through knowingly and deliberately breaking your grooves, in order that you can improve your physical and mental flexibility and your tolerance of stress.
Physical and Mental flexibility
I know it seems fairly obvious, but unthinkingly carrying out the same physical protocols day in, day out, is not likely to be hugely beneficial for your physical health. You run the risk of never actually taking even a moment to STOP, and allow your body to properly rest.
But this is true mentally, too. Trapping yourself in an unthinking groove won’t help you mentally either. To take the musical example, if you mix up the practice room you use and the time of day you practise, you are giving yourself low-stakes opportunities to experience different acoustics and different experiences of playing. This gives you the mental flexibility to be able to deal with changes of space, time and audience when you perform. This means that you’ll be far less likely to be phased by a grumpy examiner, or that audience member rustling a cough sweet wrapper for an eternity!
Small amounts of stress are good
Deliberately changing your routines will also leave you less open to amygdala hijack. This is where your reasoning centres become unable to inhibit the fear reaction from the primitive parts of your brain, making it difficult to think or remember anything. By choosing to mix things up, you are helping your brain to develop the reasoning power and mental discipline to control your amygdala more effectively. There is an increasing body of evidence that choosing to undergo small amounts of stress helps to prime your brain for improved performance by causing the production of new nerve cells that help you to be more alert. 
So try changing your routines. Find ways of subtly placing yourself under a modest (and short-lived) amount of stress.
- If you are doing an audition, for example, choose to play in lots of different spaces with different acoustics, and choose to play in front of people.
- If you’re doing a half marathon (like I will be soon), choose to run at different times of day, or after doing some heavy mental work, in order to stretch your mental discipline.
- If you are involved in an occupation where it is tempting to do things one way all the time, see if you can find a way to change your movement patterns.
Your mind and your body will thank you for it.
 Alexander, FM., Man’s Supreme Inheritance, Irdeat ed., p.67.
 ibid., pp.140-141.
 Katwala,A., The Athletic Brain, London, Simon & Schuster 2016, p.123.