The archives are like the freezer—items are in cold storage until they are needed, which could be far into the future. Resources are like the pantry—available for use in any meal you make, but neatly tucked away out of sight in the meantime. Areas are like the fridge—items that you plan on using relatively soon, and that you want to check on more frequently. Projects are like the pots and pans cooking on the stove—the items you are actively preparing right now.
