In other words, you are always trying to place a note or file not only where it will be useful, but where it will be useful the soonest. By placing a note in a project folder, you ensure you’ll see it next time you work on that project. By placing it in an area folder, you’ll come across it next time you’re thinking about that area of your work or life. By placing it in a resource folder, you’ll notice it only if and when you decide to dive into that topic and do some reading or research. By placing it in archives, you never need to see it again unless you want to.