Ask yourself, “Am I freely giving my time and effort to help someone else, without being paid and beyond what I am normally responsible for doing?” If yes, it probably qualifies as service.
Service hours and Acts of Discipleship are not the same thing. Praying a Rosary for someone, attending a Holy Hour, or praying at a cemetery can be excellent Acts of Discipleship, but they would not ordinarily count toward service hours because the purpose of the service requirement is active service to others