We'd recommend archiving. This way they will not be visible on the board anymore however you can still refer back to them via the "Archived Items" section in the board.
You can also archive all cards in a list by clicking (...) in your "Done" list and select "Archive all cards in this list".
More information about archiving is available here: http://help.trello.com/article/795-archiving-and-deleting-cards
So you’re using Trello at work, at home and to track your new DIY crafts. The family and co-workers are all on board and everything is organized, color coded and has a due date. But still, there’s so...
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