一个平日的天平常的一天 (I think you are trying to express "an ordinary day" ^_^)
今天上午(早晨)(早晨 usually means from 6am to 8 am, and 上午 means from 8 am to 12 am),我吃了早饭。我平日(平时)(平日 is more literal. It's mostly a written language.)得吃一片烤面包和水果,我也喝两杯咖啡。九点钟我开工(开始工作)(Just feel bettter.)。在我的工作(中),我常常开会也给同属(同事)打电话。中午我回家吃午饭。下午我在电脑上工作。六点钟我回家。晚上我和(很)喜欢看电视, 看一本书还是(或者)学习中文。