Being on time
It may seem like a minor, relatively unimportant, or overly compulsive issue, but being on time is a performance benchmark. Having a reputation for being late sticks; it doesn't go away.
Source: Marketing/sales consultant John Graham
For anyone in sales who wants to show customers that they are dependable, reliable, and can be counted on, being on time sends the message, a characteristic that has immense value in business.