I get a regular news email from paddling.net and they have a host of articles on canoes and kayaks and below posted their safety archives. On particular article that I neglected to read was about righting a turned over canoe in deep water. My experience in sort of "friendly waters" was a golden opportunity to give the technique a try but I missed it! Since my mishap happened where it did (and being very lax about safety), I took it as an omen for future strange waters. Anyplace else I would have been wearing a PDF.
(Here's that link just in case you don't have it)
http://www.paddling.net/sameboat/archives/#technique