With one exception, my afib episodes have all been while relaxing, often while going to sleep.

I have not had any for two years- knock on wood. I never eat after 5pm or 6pm, because reclining after eating (on sofa or in bed) seemed to be a trigger.

I take magnesium at night and I drink low sodium V-8 for potassium in the morning- a tip I got from an afib forum.

Everyone has different triggers of course. I have read that some afib is adrenal-related and some vagal. You can look those up....there is also a good forum for paroxysmal afib.