’Keep your workspace uncluttered,’ from my high school graphic design teacher Mr. Leon Friend, Brooklyn, 1955.
Works for the mind also.
Mr. Friend was unusual for a teacher of that period in that he treated all the students as though we were young adults and not teenagers. The high school was in a lower-middle-class neighborhood, and the depressing attitude of the teachers was that when you finished school you needed to have mature work habits to survive in a tough world (a little like today). It was just a general statement he made during class. We just had regular school desks.
He had many famous students in the professional graphic arts world: Alex Steinweiss, who created the first record covers, and Seymour Chast, who founded Push Pin Studios along with Milton Glazer.