Every productivity system stops working eventually

One of the most important things to know about productivity routines and systems is that none are invincible. GTD, Pomodoro, Animedoro, Kanban, Agile, Pair Programming — all will eventually fail. This might be because external forces are too strong, or the routine isn't the right fit for the job, or many other reasons.

This means a few things:

• You should have multiple routines.
• Take note of when things fail, so that you know the limits of those routines.
• Be prepared to switch routines as soon as they fail.
• Forgive yourself when everything fails and you achieve nothing.
• Cut yourself some slack, literally - leave days open and unscheduled.

First spotted this on Alexey Guzey's blog post, Every productivity thought I've ever had, as concisely as possible