We have all used them and attached them to our fridge or computer. But now Post-it is an app. A very useful one has your post-it’s can be group. Great too for to-do- lists .
Now it’s gone digital you can dynamically make them, change them and swop them around .
You can then have a variety of ways to output them as a pdf or a jpeg so that you store them or print out to work through. This would also be a way of brainstorming some ideas and moving them around or linking to groups and ideas. It’s very simple and very powerful. Especially for organization and forming ideas into groups .
I like the option to Trello as I use that for projects .