It's been a tough week so far with early mornings and late nights. I need to focus today on a task which requires full concentration and no mistakes. I got to sleep at midnight after working late, was woken up by my child at 3.30 and have now been awake for an hour after forgetting I had my alarm set at 4.55am for a 5am call last week. Apart from coffee what are your tips for being productive ad not making mistakes after very little / interrupted sleep?