The secret to GTD
The real trick to ensuring the trustworthiness of the whole organization system lies in regularly refreshing your psyche and your system from a more elevated perspective. That’s impossible to do, however, if your lists fall too far behind your reality.
You won’t be able to fool yourself about this: if your system is out of date, your brain will be forced to fully engage again at the lower level of remembering.
From David Allen’s Getting Things Done.