When you arrive in Calgary, one of the keys to make your life easier is to apply for official documents:

1. Social Insurance Number (SIN): All the employers ask for it. It approves that you are legally entitled to work in Canada. So, for employment you definitely need it. It’s important that you protect your SIN card since it can be used to obtain your personal information and invade your privacy. http://www1.servicecanada.gc.ca/en/sc/sin/index.shtml

2. Health card: Hospitals and doctors are very expensive. If you don`t want to handle an expensive health bill then you should be covered by Alberta Health Care Insurance Plan. http://www1.servicecanada.gc.ca/en/subjects/cards/health_card.shtml 
   For FAQ on health card http://www.health.gov.ab.ca/ahcip/ahcip_faq.html

3. Blue Cross: It’s supplementary health coverage for Albertans. http://www.ab.bluecross.ca/