I love checklists in Trello.
Did you know that if you name your checklists, you can make your life so much easier?
So, if you have e.g. an Onboarding Procedure for instance, you could name it ‘Onboarding’

Then when you want to use the same Checklist again, simply go to Checklists and the drop down menu ‘Copy Items From…’

Select the Checklist ‘Onboarding’ and then your checklist will appear on the new card – and you don’t need to type the checklist out again! Watch this handy little video to see it in action:
Hope this helps!