Most people still treat RRSPs as a pure tax deduction, what you should do as a first step is calculate how much you need to save to retire, then see if using an RRSP will be more tax efficient than a tax-free savings account (TFSA)" says Marc Lamontagne, CFP with Ryan Lamontagne in Ottawa. 

The Globe and Mail, Joel Schlesinger
February 2016

Millions of Canadians have registered retirement savings plans. Yet many of them do not give much thought to RRSPs beyond a monthly or annual contribution.

Full text: Six little known facts about RRSPs