Aren’t you curious as to how your night went? Many times you don’t remember exactly but you know it wasn’t great.
Have a smartphone app that records the time something passes over the phone at a certain height. Have the app running and place the phone on your nightstand when you go to sleep. Every time you wake up during the night, just wave your hand over the phone to record this. In the morning, you’ll get the whole picture of how tour night went.