“Impatience is close to boredom but always results from one cause: an underestimation of the amount of time the job will take. [F]ew jobs get done as quickly as planned.

“Impatience is the first reaction against a setback and can soon turn to anger if you’re not careful. Impatience is best handled by allowing an indefinite time for the job, particularly new jobs that require unfamiliar techniques; by doubling the allotted time when circumstances force time planning; and by scaling down the scope of what you want to do.

“…[O]ne of the first warning signs of impatience is frustration at not being able to lay your hand on the tool you need right away. If you just stop and put tools away neatly you will both find the tool and also scale down your impatience without wasting time or endangering the work.”

Robert M. Pirsig, Zen and the Art of Motorcycle Maintenance
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Scanned from my 1985 paperback copy, which teaches me new things every time I open it.