Org for GTD and other Task managment systems

Pomodoro is a time management technique. In this thread, Frédéric Couchet describes how he uses Org for Pomodoro:

I always start a clock when I work on a task. And for the Pomodoro
technique I use also the org-timer module with some configuration.

Activate the org-timer module :

(add-to-list 'org-modules 'org-timer)

Set a default value for the timer, for example :

(setq org-timer-default-timer 25)

Modify the org-clock-in so that a timer is started with the default
value except if a timer is already started :

(add-hook 'org-clock-in-hook (lambda ()
      (if (not org-timer-current-timer)
      (org-timer-set-timer '(16)))))