Since we are moving to Google Drive as our main storage location it might be time to organize your Drive. When you turn on Priority Drive, Google creates two sections for you on your Google Drive landing page. On the top, you have documents that you have recently edited and suggestion files. What that means is that if you always work on a document at the same time, Google Drive will recognize that and place it on the top as a suggestion for you.

The other section are Workspaces. Workspaces allow you to add up to 25 files into a "folder". You can use Workspaces to put in topics based upon your classes, content, or topics that you are keeping track of. 

Priority Drive must be turned on in the settings. Give it a try.