I use Trello. It works best for me because: - It's easy to view the list at a glance - It's easy to add items, move them around, mark them as done - It is al

I use Trello. It works best for me because: - It's easy to view the list at a glance - It's easy to add items, move them around, mark them as done - It is always with me, thanks to a smartphone app - It gets unwieldy if there are too many items - this is not a bug but a feature which reminds me to keep lists manageable!