We flipped in Basswood Lake near US Point a few years ago.  We were dead into a Southwest wind and should not have attempted the crossing.  But we did, and ended up in the water.  A couple thoughts...

Keep your important clothes dry.  We were in the soak for about an hour before hitting a reef in the middle of the lake.  There was no shelter and we needed to get warm and dry.  Fortunately, we all had our "survival" layers packed tightly in a dry sack so we shook dry, and put them on and warmed up.

Also, if you can, hold on to your paddle.  They are a lot harder to find down wind after the fact than your canoe.  If possible, stay with your canoe too.  

Never underestimate how fast things can go south when you are out there.  When things start to turn, take note and get secure.  Things have a tendency to unravel if you don't.

And, have fun.  Strong morale is essential to any survival situation.