Some people remember the things by writing notes to themselves . Then they leave the notes in obvious (明显) places , such as on the table or on the floor in the middle of the living room . I don ’ t think I like to write notes to myself . Most of the time I lose them or forget to look at them until it ’ s too late . I prefer to use an alarm clock f 闹钟) to tell me what I should do . I have ten alarm clocks in my house . They could tell me about things . For example , if I have to make a telephone call at a certain time , I ’ ll set an alarm clock to go off a few minutes early and put the clock by the telephone . Or if I want to watch a certain television program , I ’ ll set an alarm clock at the right time and put the clock on top of the TV set . I can remember almost anything if I use my clocks . However , sometimes an alarm clock goes off and I don ’ t know what it means . I always remember setting it , but not why I set it . If the clock is by the telephone, I know I may have set it to tell me to call someone , but I can ’ t be sure . I might have set it to tell myself that somebody was to call me at a certain time .