If you have a question for Helena Morrissey about workplace etiquette, career advancement or work-life balance, please email helena.morrissey@telegraph.co.uk  I get to see a great many CVs – both through hiring at the different companies I work with, and when people ask for help when looking for a new role. Some are just starting out, others are seasoned professionals looking for a senior position or fresh start; inevitably their CVs are very different. But I’ve also found that applications for the same job can differ wildly. Even when working with similar raw material, some candidates hit the nail on the head, while others submit CVs that cost them an interview. There is no shortage of online tutorials on how to write a CV, but some over-complicate things – and you need to check the provenance: what works in America does not necessarily work here. A headshot photo on your CV is quite standard in the US, for example, but a definite “no” in Britain (unless you are an actor, model or applying for a TV presenter role). It’s not merely a matter of etiquette or tradition: recruiters worry about the risk of perceived discrimination, either positive or negative, if you...