给父母申请绿卡,递交一大堆表格,文件,如何整理比较好?

So I'm submitting a thick pile of papers: application forms (I130, I485, I864, G325A, etc), and supporting documents, etc.  And I'm petitioning for both of them at the same time.  It's a pretty messy pile.  Can anyone suggest a good way of organizing so many forms, docs?  Thank you!!

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