I can personally attest to the benefit of downloading an app to your phone to record dreams (there are lots to choose from). I co-sleep with a baby and had to ditch the pencil and paper method a few years ago. This way I can keep the lights off and still get all of my thoughts and memories recorded in the middle of the night or morning. Many apps don't save your dreams if you update your phone though so make sure you email them to yourself if you go this route.