Created documents get put in folder you are in
When you create a document, if you are in a folder, it gets created in said folder.

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joe.crawford commented
Actually it already works like this, my idea is that when creating documents, even from the root folder or other places, that panda should prompt you during document creation to choose a folder you want the document land in.
If you are in a specific folder when you create a doc it will do this already. But then why would I ever use the add document from the home screen? If I do, my document gets added to the root folder and I have to remember to go move it later.
I'm proposing that every time you create a document, panda should prompt you for a location, similar to how it prompts for the document name, recipient, etc.
If you are in a folder already, that folder should be auto filled in the prompt. But you could choose to change it if it's not the correct folder.
If you are on the home screen it could autofill the root folder but again allow you to change it.