Maybe change modalities and read instead of listen to music? I can understand how, if you are in "listening" mode, you would scan to hear what's being offered and overhear/listen in on other people's conversations. But if your eyes are busy and you are "looking" instead of listening, maybe that will help? How about writing; maybe jot down some notes about what has gone on so far and what you expect for the rest of your day or something, engage your brain in another way. I'd maybe take a correspondence course or buy a workbook and do work in it and learn something new or help me with something I have trouble with.