Being happy at work is something everyone wants. However, there are a variety of factors that determine who reaches workplace nirvana, including employee's age, gender and field.

In a recent comprehensive study, Robert Half surveyed more than 12,000 U.S. and Canadian workers to examine the key contributors to employee happiness.

Overall, the survey found that most professionals are generally happy. On a happiness scale of zero to 100, respondents scored a 71. Not surprisingly, results also found that employees who do not fit well with their employer are the most apt to leave. One-third of workers surveyed said they likely will leave their employer in the next six months. The survey also shed light on the top three drivers for workplace happiness, finding that having pride in one's organization is the top driver, being treated fairly and with respect is the second, and employee appreciation came in third.

“You’re only one yoga class away from a good mood,” says the lean but muscular yoga instructor, who encourages us to smile as she leads us through a flow of warrior poses. Natural light floods the room through wall-to-floor windows and a skylight that breaches the lofted ceiling. Acoustic folk songs streamfrom the sound system. As the instructor guides us to stand in mountain pose with spines tall and eyes closed, she prompts us to “find that stillness within.”

Though this seems like an upscale yoga studio, it’s not. It’s just an ordinary day at the GoPro corporate offices in Carlsbad, Calif. The half-dozen yogis that surround me are employees practicing asanas before their lunch break. GoPro, like other corporations steeped in millennial culture, has taken the route paved by Silicon Valley icons such as Google and Facebook in eschewing the old work-like-a-dog-until-you-retire (or die) ethic for a more holistic, healthful work ambiance. Productivity is still highly valued in this new corporate model, yet proponents believe that greater productivity is achieved when employees are healthier and happier.“

Remember when the office workday was simple? Everyone used to follow the same routine: Show up at 9, leave at 5, rinse, and repeat.

Those days are long gone, and they’re not coming back. Now, you might work 9 to 5, but you could also choose to work 7 to 3 or 11 to 7 and split your time between home and the office. Perhaps your supervisor flies in from New York to work at an unassigned desk a few times each month and some of your teammates only pop in sporadically because they’re telecommuters or freelancers.