Monster.ca has a lot of articles and advice for all kinds of job hunting issues including returning to work after being a stay at home parent. The most important thing is to be honest with yourself. Decide what you are willing to do and what kind of commitment you are willing to make. I know several moms that jumped into a full time job after several years off with the kids and they hated it and ended up quitting. In any case be decisive and stick with your decisions through the growing pains.
Human Resource Development Canada used to have programs to to help with employment. Also, Services Canada has training programs for people who meet certain criteria. Check out their website at http://www.servicecanada.gc.ca/eng/epb/ebsm/index.shtml
The YW/YMCA sometimes has counselling to help to determine career options and to get you on your way.
I hope these help.