If I were to think of things that happened during the day, I would never get to sleep. I focus on the comfortable feelings in bed.

Can you try a FitBit to record your stats? If your pulse quickens before you wake up, that could signal poor breathing. You can also try one of the recording pulse-ox devices. They make wrist models and others designed for sleeping. I know that most of my sleep problems were related to my breathing. Having a small complex carb snack also might help if your blood sugar cycles.