I suggest adding the numbers 0–4 at the beginning of the titles for each of the five folders you now have. Using “0” for the inbox reminds you that its contents have not yet been processed. This keeps them in the right order from most to least actionable when they are sorted alphabetically.

Most of the time, you’ll only look in folder #1, Projects. From time to time, you’ll open up folder #2, Areas, when you want to think longer term. Folders #3 and #4, Resources and Archives, can remain safely out of sight until you need them.