Asana Projects – How to Move Projects Between Workspaces in Asana

I agree with your friend about not dividing up into separate boards by type of job.

With your examples such as 'Design ideas' etc, I think they really do fit naturally within different lists on the same Board. It's exactly the sort of usage that Joel demoed in multiple videos about Trello.

The only thing I can think of, to help manage very long lists, is to use Trello's Labels system to put categories on cards, and then use filtering. You should definitely give meaningful names to the default labels.

I wrote up some tips on how to use labels recently.

Having said that, fairly early on the Trello on Trello board got huge, and eventually they reduced the scope of it. So it's does seem to be a well-known problem.

To move a story, or a group of stories:

Select them first, using the selection check boxes to the right of story titles.

Then, select the 'Move to Project...' option in the Stories drop-down menu, and choose the project to which you'd like the story or stories moved.