Give this technique a try: https://www.youtube.com/watch?v=tybOi4hjZFQ , let me know how it affects you.
I realised that I can't hold my breath for 1 minutes :)
I've tried it and stick to it a few day, like three or four. But it didn't work for me. Maybe I should do it longer. What's your expirience?
It seems to give me a boost of motivation which leads to productivity. I'm enjoying the effects!