Know what happens at 5am? Nothing. Which is great for my productivity. For the most part, the (West Coast) world is asleep and I can plow through emails, tasks, and especially, projects I’ve avoided finishing.
That’s the key. You have to find the times when you can shut off the distractions and the noise, and focus on getting things done.
Another tip is to make a list of what you want to accomplish during that time. Don’t stop until you’re done, and when you’ve finished, give yourself a reward.