My Bottom Line: Moray MacLennan, M&C Saatchi Worldwide
21 September 2012 Last updated at 17:29 BST
Moray MacLennan is the chief executive of advertising agency M&C Saatchi Worldwide.
Moray says there is a saying in the advertising industry that "you're only three phone calls away from disaster" and it is a particularly cut-throat business where even your friends are looking to steal your clients.
He also says it is a stressful business because of the tension that exists between the business side and the creative side - he has to make deals with clients, but he is not in control of making the advertisements.
However, he says the best way to cope is to let go - hire the right creative talent in the first place and let them get on with the job.