You may wish to check out the below information while you are travelling outside of Canada:

1. international adoption
2. birth certificates
3. death overseas
4. international driving permit (canadian driver's licenses)
5. marriage overseas
6. medical matters
7. passport services
8. pensions: Canadian Pension Plan or Quebec Pension Plan
9. registration of Canadians abroad (ROCA)
10. visa requirements:
Canadian citizens abroad or Non-Canadians coming to Canada
11. elections - voting while abroad
12. legal and notary services
13. canadian vital statistics office

Emergency services

1. arrest
2. child abductions and custody issues
3. natural, military or civil disturbances
4. financial assistance
5. loss of belongings
6. medical assistance
7. missing persons
8. passport services
9. transportation accidents
10. other potential problems
11. registration of Canadians abroad (ROCA)

see also: before you go & returning to Canada.