We’re naturally more energetic and motivated at specific times of the day. Researchers call this our Circadian Rhythm. Every person’s rhythm is slightly different, but the majority follow a similar pattern.<ul><li>Waking up. Our energy levels start to naturally rise.</li><li>Around 10 am. We’ve hit our peak concentration levels that start to decline and dip between 1-3 pm.</li><li>Afternoon.  Our energy levels rise again until falling off again sometime between 9–11 pm.</li></ul>

Energy curves

We work best in natural cycles of 90-120 minute sessions before needing a break. When we need a break, our bodies send us signals, such as becoming hungry, sleepy, fidgeting, or losing focus. If you ignore these signs and think you can just work through them, your body uses your reserve stores of energy to keep up. It means releasing stress hormones to give an extra kick of energy.

90 Minute Cycles

There’s a simple curve to how email usage affects our productivity. No email = OK productivity. But as we start to use more email, we become more productive thanks to more access to information and collaboration. But this only works to a point.Once you cross that threshold, more email usage drops productivity to a point where nothing gets done.

Communication curves

Studies have found we’re actually more effective when we’re stressed. Up to a point.The right amount of stress at the right time can make us more productive. This requires awareness of your stress levels and how they’re affecting the work at hand.

Stress curves

How to design the perfect day based on your productivity curves.<ul><li>Discover your daily energy/motivation curve. </li><li>See when you’re hitting your communication threshold. You might want to schedule specific times to check email, like during a break in the morning and again in the afternoon.</li></ul>

When to work

A lot of the internal things that affect our productivity are out of our control. Our energy, focus, and motivation follow their own path or “productivity curve” throughout the day.  <ul><li>Fighting against your personal productivity curves leads to overwork, feeling overwhelmed, and burnout.</li><li>If you learn to work with your natural peaks and valleys, it can tell you exactly when you should schedule each part of your day.</li></ul>

Personal Productivity Curves

How many times have you started a day on a motivational high, only to hit the dreaded 2pm crash and never recover? Not all hours of the working day are equal. And unless you're some sort of productivity super-being, you more than likely end up riding a rollercoaster of motivation, energy, and focus as the day progresses.

When to work

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