According to Thomas Frank, what does it take to maintain an organized system?

Minimal effort once the system is set up.

Only using the system when new assignments are given.

Constant revision of the chosen tools.

Habitual and correct use of the system.

In order to maintain an organized system, Thomas Frank emphasizes the importance of habitual and correct use of the system. This means consistently implementing the system in your daily routine and using it correctly to stay organized and efficient.