I've tried Pomorodo a few times, but it hasn't really been working for me. I'm more of a GTD guy. This idea of fixed amounts of time to work just doesn't work f

I've tried Pomorodo a few times, but it hasn't really been working for me. I'm more of a GTD guy. This idea of fixed amounts of time to work just doesn't work for me. I need a few minutes to really get into the zone and then I don't want to stop after 25 minutes but rather after I've completed the task.