Quoted:
I can only speak for myself.

Cinnamon?  cinnamon only works for people that have diabetes due to a chromium deficiency.  It DOES NOT help everyone with diabetes.

I have found that exercise right after eating lowers my blood sugar.  I suspect that the body needs to burn the sugar before it can attach to the red blood cells.  Once the sugar attaches to the blood cell, you have lost the ability to help yourself.  If I exercise without eating, my blood sugar rises!  My theory here is that my body is converting fat into sugar to "feed" my muscles.  My advice: learn to exercise right after eating if possible.

I have recently begun working out with my daughter.  I was using a treadmill for 30 minutes but I am now doing muscle building exercises.  I am noticing that my blood sugar is dropping faster with muscle building than cardio.  That may be just me though.  I theorize that my muscles are burning sugar all day long instead of just burning sugar during the exercise.  I'm not fully convinced of that though.  Find what works for you.

I also starting eating less food. We are told to eat mostly carbs in diabetes class but I try to avoid them anyway.  Look at labels and get used to looking at them.  Try and limit your carbs to 60-75 a meal. I heard that alcohol lowers sugar levels.  I looked into that and tested it in my diet.  I found that ONE beer WITH the meal helps lower my levels.  It does not work after or before the meal.  I only know that it does work (for me).

Things I learned:  There is no such thing as borderline or pre-diabetes.  You either are or you are not.  Anything else is controlled or uncontrolled diabetes.

I read that your meter is a few years old.  Are you sure it is calibrated?  They provide a serum with the meters to make sure the meter is giving good numbers.