Nineteenth Century Advice to Twenty-first Century Multi-taskers

Give your whole mind to whatever work you are doing.  If
it  is merely adding rows of figures, or copying reports, try every
time to get it exactly right, without a single mistake.  And never
turn over your work till you have carefully examined it, to see if
there is the slightest mistake.  Make it  a matter of ambition, of
official fidelity and honor, to do your work well.

Advice of JAB to nephew in A. T. Robertson, Life and Letters of John A. Broadus (Philadelphia: American Baptist Publication Society, 1901), 318.