The Christmas season is supposedly the time for stress, depression and anxiety (which is somewhat of an urban myth). But assuming you have one of these issues now, or at any time, there is a helpful acronym that can bring PEAS to your life:
Pleasure - Do things you enjoy
Exersize - In some studies it does better than medication to reduce depression
Achievement - Give yourself goals and work towards them, giving yourself purpose
Socialize - Spend time with friends, relatives and others; connect with other people
I think the only one missing here is religion, which gives people a framework to structure their lives.