As a new employee for a discount brokerage firm, I went for a month of classroom training. Warning us about the volume of information we were required to memorize, one trainer suggested we make lots of notes on file cards.
When I completed the course, I was assigned to a team where, as suggested, I taped all the file cards, crammed with notes, onto my computer.
On my first day of trading, a veteran broker sat with me. He immediately noticed all the cards, and my apprehension, so he promptly made up a new card, which he taped to my computer.
It read "Breathe."