Scott Laidler, a London and Los Angeles-based personal trainer to the film industry, gives the lowdown on life as a PT. You think it's all glamorous and huge fun? Think again! You'll become unfit, drink far too much coffee and live in a gym bubble. As a fitness columnist for The Telegraph and top trainer, Scott knows the realities of this job and lays them out in a darkly humorous and well-illustrated article. Number 8 is my favourite.