Do not overdress
There is some truth to “dress for the job you want,” but hiring managers don’t advise going overboard (unless you love monocles and somehow have an in for being the next Monopoly guy). During your phone interview, ask the recruiter what the dress code is like at the office. While you do want to dress better than the average person at the company, wearing a three-piece suit at a t-shirt-and-jeans workplace (which are really common nowadays) shows that you are painfully unaware of the company culture you’re vying for.
Be. Your. Self.
Several of the hiring managers we spoke to, including two high-level guys in Silicon Valley, let us in on the secret that not only is “social fit” a factor in their hiring decision, it could ultimately discount an otherwise perfect hire. Some companies even mix in culture-only interviews to get a sense for your personality. So, while just acting normal (read: not turning into a stressed out, overthinking mess) was always good advice when answering high-pressure interview questions, in 2015, it is now a legitimate factor in many companies’ decisions to even consider you as a viable candidate.