Like a lot of Manymoon's users, we're managing large projects with tasks spread out across a large team.  We've found the best way to organize workflow and tasks is through "Milestones".  Here's what we do:

1. On the Milestones Tab, create milestones that are specific to a topic, not necessarily a date (i.e. Meeting Minutes, Contractor Correspondence, etc).  

2.Create a task specific to one or all of your team members, and attach a document to this task (we integrate all of our files from Google Docs - very nice feature that helps avoid double uploads).  The task could be something line "Construction Meeting No. 2 - Review Minutes", and the attachment would be the document.

3. In the Milestone field inside the Task Box, select the milestone (you could call it a category) where you want to file this task.  In this case, Meeting Minutes would fall under Milestone "Meeting Minutes".  

4.  Assign the task to as many people as you want, and leave the field "require only one person to complete the task" field unchecked - doing so will ensure that the task will reside in your milestone until you as the project manager or task creator decide it's time to close this out.

5.  Click on the Milestones tab, and check out your milestone - should be right where you need it.  Leaving the milestones open will allow you to keep the task, and the documents within them, open until the end of the project.

Happy Manymooning!