You have to include "document Check List" with all the forms. So what we did is, put everything in the order it was listed in there. Also, for example you want to include "proof of relation documents, I just put an extra paper on the top and listed what was included in the section "proof of relation documents". So example:
Title: Proof of relation Document
List item:
1)photo
2)joined accounts
3) and so on...
then pin it with paper clip.
So everything is by sections,just like writing a report for your project

Also, do what makes you feel safe and satisfied. Take your time and don't worry. Good luck