How do I pull up all board activity with a due date of today?

Connie Williams

?

Matthew N

Hey Connie

You can do a search due:day - This returns cards due within 24 hours

or

You can filter your cards "Due in next day"

If you're looking for cards assigned to you, you can find all cards due  across all boards at www.trello.com/my/cards and filter as appropriate.