It’s that time of year again. Employees are preoccupied with thoughts of holiday shopping, party planning and visiting relatives, and the stress of it all can seriously impact their work. So what can you do to help? While stress is a year-round issue, there are more obvious triggers for it around the holidays. Mark Malis, the head of global human resources at LifeWorks, assembled a list of five common causes of stress during this time of year, and what you can do to tackle them.