Dr. Bernstein warns against peanuts, so I stopped eating them (either plain or as peanut butter) except as a rare treat or ingredient in stir fry.

Dairy is my own personal Waterloo - I shouldn't have any but have a hard time keeping away from cheese & yogurt. After a recent illness that affected my gut I'm now more sensitive to lactose. That should help me cut down on dairy.

Stress - both good & bad - can cause an increase in blood sugar levels, so maybe it's just a temporary thing.