In the case of Trello, you can create a master board to automatically gather all of your most important tasks (or the ones whose deadlines are closest at hand) in one place for easier prioritization.
Manually inputting similar data is a big time suck. Use something like Asana to perform batch operations by multi-selecting tasks. You can “assign batched tasks to one person, give them all the same due date, mark them as complete or incomplete, or — maybe the biggest timesaver of them all — delete all of the selected tasks.” In the case of Trello, you can create a master board to automatically gather all of your most important tasks (or the ones whose deadlines are closest at hand) in one place for easier prioritization.