被waitlist了，该怎么办？

今天收到招生办的信，请大侠帮我看看，出出注意啊

Thank you for your application to the XXX MBA Programme. We are impressed by your academic and professional performance. However, as the competition for this year’s programme is intense, you are short-listed for further consideration for the 2007 Intake.  

Please do let us know if you have any further supporting information that will help us make a positive decision on you. Should you have any questions concerning your application, please do not hesitate to contact the XXX MBA Admissions Office.

我该补充什么样的材料比较合适？

该交的材料估计楼主也都交过了，要是还有对录取有利的材料，谁会等到waiting list了再交？肯定申请是就交了。

楼主是否就申请了一所学校？其它学校的战绩如何？如果有其它学校的offer，或者conditon offer、或者其它学校也是waiting list，那提交一下，是否会对申请有利？