We've been hearing a lot about company culture these days. From Uber making headlines for its "aggressive, unrestrained culture" – to companies like Google, REI and Publix that consistently rank on Best Place to Work lists – it's clear creating a genuine, positive culture can be that make-or-break factor for many companies.

As an organizational psychologist, I've been studying company culture for more than 20 years. And what I've found is that for a positive culture to really blossom, it needs to visibly and authentically demonstrate support for well-being – feeling good and living with purpose. Having well-being as a fundamental part of your culture shows your employees that you both care about them as human beings and that you don't just think of them as expendable or "cogs in the system."

At its core, culture tells employees what's acceptable. It's the collective values, norms and beliefs of the organization — also known as "how things are done around here." Culture provides the backdrop for everything that happens at a company and the day-to-day experiences. But it's unseen – it's not written down. This makes it a bit elusive, and definitely something you have to work at every day.