英语句子成分We have rounded up a list of some of the best advice f

英语句子成分
We have rounded up a list of some of the best advice from 32 presidents past and present on how to do and be your best,no matter how challenging your job is.
句中on how to do and be your best,no matter how challenging your job is是什么成分,修饰什么?
请具体一点