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Being as full time student and working full time as put me in a tight schedule on a daily basis and on between these things i am always using spotify  a music app. Which to a greater degree helps me keep track of time as i can able to guess after how many minutes what should i do. For example i take short naps or just close my eyes and rest for a few minutes and listen to music at that moment, and it helps me count after how many songs should i wake up and get dressed for work.  By listening to music i am able to manage my time more accurately or manage how much time i should spend while doing a certain task.