A rare beast: an article about productivity that doesn’t just contain the same old stuff you’ve heard before. This mainly focuses on why often it’s better to do less to get more productive.
But I was most intrigued by the revelation that sleep cycles actually continue when you are awake:
The difference is that during the day we move from a state of alertness progressively into physiological fatigue approximately every 90 minutes. Our bodies regularly tell us to take a break, but we often override these signals and instead stoke ourselves up with caffeine, sugar and our own emergency reserves — the stress hormones adrenaline, noradrenaline and cortisol.
Working in 90-minute intervals turns out to be a prescription for maximizing productivity.