Just now one of my friends asked for my advice for her brother on applying for studying aboard. He is a junior in University and I just said it's not too late to prepare a good academic history for himself.
I have read many discussion about how to make fake transcripts and reference letters for studying abroad because of their bad scores. Many Chinese students didn't take seriously with their undergradute study and wasted their time on dating, playing tractors or even doing nothing while their american counterparts are working hard with researching, reviewing class handouts, preparing presentation and class discussions, buring the light all night for the exams ..
Please give serious advice to your friends or relatives who are taking unversity classes: the scores, academic activities and the awards are critical for the application and a serious attitude to what you are doing will benefit your whole life.