Regarding the question 9 of Background Declaration, I don't know, how many applicants write it correctly or noticed it - I wrote it wrongly (Not Applicable). Hope that it will be treated as minor error as there is no wrong with representation/intention. Also new applicant should observe it and write correctly.
http://www.cic.gc.ca/english/information/applications/guides/EG7TOC.asp
Schedule A – Background/Declaration (IMM 5669)
Question 9
Indicate the names of all membership or association with organizations you are or were a member of, including:
political organizations,
social organizations,
youth or student organizations,
trade unions, and
professional associations.
If you were not a member of an association or organization, do not write “not applicable”. Rather, write: “I have never been a member of an organization or association”.