I adore Trello.<p>It's the only productivity/todo list type app that I have ever stuck too.<p>I think it's mostly because of the flexibility it overs. I put everything into it.<p>I have a whole board called 'Spark File' which is just lists of stuff, so whenever I need an idea for something it's there. Want to watch a movie? I've made a note of every trailer I saw that looked intreasting, every movie i've had recommended etc, I can find something on there to watch,<p>Want to get someone a gift? I've noted down anything they have said or I have seen that is relevant, so i've got a list of stuff to consider to go.<p>Black Friday? I've already got a list of things I am looking to get sometime, so i can simply check if anything is on offer, etc etc.<p>My main todo list has Inbox, todo, Doing, done. I capture everything to the 'inbox' and then when i sought through it, it either becomes an entry in the relevant list in the 'spark file' or I figure out an action i can take on the idea and it becomes a todo.