It took me a while to figure out how to use Work Flowy in a way that will help me. Here's what it's become for me:
1. A To Do list separated by due today (or this week), due this month, due this quarter, due this year. Some stuff winds up on multiple lists (e.g. grad school is on this quarter and this year to keep it in my mind).
2. A few shopping list templates with basic items. I don't ever update them, but when I get to the store, I look and make sure to get whatever I know I don't have (the list has stuff like eggs, meat, vegtables, fruit. It's extremely vague, but helps me not miss a section).
3. Random notes that I've written down and may or may not ever go back to. I used to have a collection of these on my computer in assorted Doc files (and some on google drive) and I never knew where the one I wanted was). I read through my whole workflowy every month or so and get rid of what doesn't belong anymore. A lot of times, though, I am reminded of something I wrote down months ago and can now think of it again.
4. A few small projects that I'm working on broken into steps to make the whole project seem less daunting. Currently have a bathroom remodel on there (I used to do construction, so this really is a small project for me) with tasks like: tile, plumbing, electric and sub sections for what I need to pick up from Home Depot.
It's not perfect, but the apps that are currently out there never worked for me (Orchesta, Clearly, Remember the Milk, etc.)
Someone should really make a to-do-list-app framework to make building to-do-list-apps more efficient. Think of the amount of time that's been wasted making to-do-list-apps.
Its a common notion, ( never really tried probably should ) once you list down all the things down in form of a organised list the chaos in your mind created by so many things just settles down.
Planning gets simple and you tend to do things the better way, your mind which was just filled with things about this and that is now ready to do something about those things.
Of course its still odd to link someone to just a to-do list manager instead someone should explain what should be done with that tool.
Life-changing.