To manage actionable things you will need the following:

• A project list. Allen defines a project as any desired result that requires more than one action step. If an action doesn’t complete the work, you have to add a project to this list, which will remind you there is something still left to do.
• Storage or files for projects materials.
• A calendar, where you will place actions that have to happen necessarily on a specific day or time.
• One or more next actions lists, where things that just need to get done as soon as possible will go on. If you have loads of actions here, it makes sense to subdivide this list into categories or use several lists.
• A list of reminders of things you are waiting for.

For nonactionable items the possible categories are:

• Trash, for stuff without any value
• Incubation area, where you will put things you want to be reminded of later, so you can reassess the option of doing something about it. You will probably need to divide this “someday/maybe” list into several categories. For those things you need to be reminded of on a specific day, you will need a different kind of file.
• Storage for reference material.