Freecycling is a great way to cut consumption of new things and to share our collective wealth. Aside from Craig's List, you can join groups to post what you need, and what you can give away.
Free 4 Kids TO Reuse
For free baby and kids stuff (over 1700 members)
http://ca.groups.yahoo.com/group/free4kidsTOreuse
Free TO Reuse
For general free stuff (over 5700 members)
http://groups.yahoo.com/group/freeTOreuse
Aurora Newmarket Recycles
http://groups.yahoo.com/group/AuroraNewmarketrecycles