Welcome to week 4 of the weekly articles from the 72 Hours Life Community. Each week we take one idea from There Are 72 Hours in a Day or The 72 Hours in a Day Workbook and turn it into something you can use before the week is out.
We have spent three weeks on the mechanics of time: where your hours actually go, how to plan the week around what matters, and how to protect the first stretch of your morning. This week we zoom out to something the clock completely ignores: your energy.
Two people can look at the same calendar and have completely different days. One sprints through a demanding project at 8 AM while the other can barely form a sentence before 10. Neither is lazy or disciplined by nature. They simply have different energy waves, and most of us were never taught to read our own. The workbook makes this plain: managing energy is half of managing time. An hour at your peak is worth three hours in your trough.
Step 1: Draw Your Energy Map
For the next two working days, rate your energy every two hours on a simple 1-to-5 scale. One means foggy and forcing it. Five means sharp, engaged, ready. Jot the number down when you finish each block of work; do not try to reconstruct it from memory at night, because memory is generous and evenings lie.
By day two, a shape will emerge. Most people find one clear peak in the morning and a second, smaller one in the late afternoon, with a reliable dip after lunch. Some people are the reverse. The pattern itself does not matter. What matters is that you now have a map instead of a guess.
Step 2: Match the Work to the Wave
Now sort your week’s work into three buckets. Peak work is the thinking that moves your life forward: writing, planning, deciding, building. Mid-band work is everything that needs you but not your best self: email, calls, errands, admin. Trough work is the maintenance of life: filing, tidying, forms, scrolling the news.
The rule is simple. Give your peak hours only to peak work, and give mid-band and trough work the hours that were going to be wasted anyway. When people say they do not have time, they usually have plenty. They are just spending their best hours on their dullest tasks.
Step 3: Defend the Peak Like an Appointment
Here is the hard part. Your peak hours are exactly the hours other people want: meetings, calls, favors, drop-bys. Defend them the way you would defend a doctor’s appointment. When someone asks for 10 AM and 10 AM is your sharpest hour, offer 2 PM instead. You are not being difficult. You are being honest about when you can actually show up well for them.
This Week
Pick one peak block tomorrow morning, just ninety minutes, and give it to the single most important thing on your list. No email before it, no phone, no quick check of anything. That is the whole experiment. Notice how different the day feels when the best part of it went to the best thing you had.
Want to go deeper? Work through the full exercises in The 72 Hours in a Day Workbook, and keep exploring the series and community at the 72 Hours Life Community hub.