Another tip most riding won't like. It isn't so much about making your visible as it is about making yourself know your surroundings. The only way to know your surroundings is to be paying full attention to what is going on around you. This means listening to what is going on around you instead of listen to audiobooks or music on a phone. Keep the earphones at home as well as all the audio files. Pay attention to your surroundings, whether on a rail trail, where a deer or other wildlife could hop out in front of you, or on the road where a car could pull out in front of you or come up and hit you from behind.
Decided what is most important at the time in question. Is it listening to audiobook/music, if so listen to the music and put your full attention to it. If it is riding the bike then ride the bike and pay full attention to it. When you try to do too many things at once your going to miss something...it might be the best part of the book, or it might be the car that is about to hit you.