I guess it is always a good idea to order GCMS notes and check what is going on in terms of criminality and eligibility. If you are in Canada, GCMS does not cost you a dime (under privacy act).
GCMS online request wbsite:
atip-aiprp.apps.gc.ca/atip/welcome.do
Under criminality:
1) If you see a note that fingerprints are required - it is best to do so immediately rather than waiting for a request from CIC.
2) Do not wait until the very last moment for getting Police Certificates. If you can get them now, submit them immediately after you get the certificates. Do not wait until CIC asks for them (never assume that CIC may not ask you to submit). Always remember : The certificate must be issued no more than three months before you submit.
Under eligibility:
If you had previously submitted a partial reference letter (duties missing etc) and if you can get an updated one, submit it immediately ! Dont wait until you see a negative remark in the gcms notes. Also, if you get NOA / T4 later during the year, submit them once you get them. Based on most notes that we have seen in the forum, eligibility is determined mainly based on Reference Letter + T4 + NOA + Pay stubs.
All the best !