I used the Pomodoro technique (25/5) when writing my Master's thesis. I had no problem settling in after my breaks. When the 25-minute work period ended, I would literally stop mid sentence, leave my text editor open, and walk outside. It was easy to get started again after my break, because I was in the middle of a sentence that needed finishing. That was usually enough to get me back up to speed, because after a 5-minute break, my mind hadn't wandered too far.
