A system includes a port to receive brain activity data of a user, a processor to detect a beginning time of a user nap based upon the brain activity data, and a user interface to notify the user when a predetermined nap time has elapsed. A method of monitoring a user somnolence level receives brain activity data from a user, and determines a somnolence level from the brain activity data. If the somnolence level is sleep, the system determines if a nap has progressed to a waking point, and if the nap has progressed to a waking point, alerts the user.