The Roger Bacon column in 'Flight' magazine used to feature ARIAs (Alway Remembered Instructors' Advice). I particularly liked one from a chap who had saved for years for his PPL and when he finally had enough wonga, he went to his local flying school to enrol. Keen to make an impression, he put on his best suit, shirt, tie and shoes and duly presented himself in the CFI's office.
After a discussion about the training and fees, the chap, still keen to make an impression, said to the CFI, "As I'm about to embark on fulfilling my life-long ambition and learn to fly, is there any particular advice you can give me?"
The CFI looked the chap up and down and siad "Yes, never wear brown shoes with a blue suit"
