We had a proper old school Account Man who used to work at DDB London called John McKnight and he was an absolute legend, smart suit, elegant 'tache, cigar cradled in one palm and a glass of brandy in the other. You get the idea. Every year he did a training course for junior account people, which at Tribal we also attended (integration 2001 style).
The one thing I remember from that course that has been useful to me over the years is the idea of a 'nifty fifty'. The central idea is that as an account man you MUST NEVER HAVE LESS THAN £50 IN YOUR POCKET. This simple yet beautiful wisdom has done me proud on a number of occasions.
Actually, a second, but related point is that you must never have less than 1/2 tank of petrol in your car. His point being you never know when you might have to dash across the country on some Red Adair style last minute client grooming. However, for some reason, the exhortation "your reward's in the car park" has never quite rung true with me.