One idea if you are in the lowest tax bracket you might want to consider is making withdrawals from your RRSP up to the limit of that bracket and putting the funds directly in a TFSA (up to the maximum $5,000 limit).
That way the funds can still grow for you tax free but you would have more freedom to pull them out in retirement and not have to worry about the taxes.
But if you are going to remain in the lowest tax bracket in retirement as well (depends on the size of your RRSP / RRIF) there might not be a huge tax advantage. This would really work well if you are in the lowest bracket now but would jump up a bracket in retirement.