Shift in state per unit of effort: how to find your biggest lever

You find your biggest lever by listing the moves you could make this week, writing the concrete change each one would create, estimating the effort, and picking the one with the largest change for the smallest effort. I worked that out on a long walk, and I now judge almost every decision by that one ratio: how big a shift in state, per unit of energy.

The answer in one line

A lever is any move where a little effort produces a large change. The size of that change divided by the effort it took is the number that matters. On my walk I put it this way: "It's like how big of a shift in state per how much energy input there is." A small push that moves a lot is a strong lever. A huge push that moves almost nothing is a weak one. Everything else in this article is how to spot the difference before you spend the effort.

Why a change in state is the thing to measure

Most people measure effort, or they measure output. Both miss the point. Hours worked tell you what you spent, not what changed. A pile of finished tasks tells you what you did, not whether anything is different now.

A change in state is different. Before, you could not do something, and after, you can. Before, you did not know something, and after, you do. Before, the business had no customers, and after, it has one. Those are the moments that matter, and they are what I want every hour to buy.

When I say state, I mean the whole picture: what you can do, what you know, what you have, and how clearly you see. I described it as "one little tiny step over here" that sets off something enormous somewhere else. That is the shape to look for. A single step, a large and lasting change.

Small examples from one morning

The walk itself was full of them.

• One coffee. I noticed it right away: "just a little bit of one cup of coffee" and my mind was racing for hours. A few minutes of effort, a completely different morning.
• Walking. Moving my body kept the thoughts coming for more than three hours. Sitting at a desk, I would have stalled after twenty minutes.
• Talking out loud. Every sentence I said gave me something new to react to, "because each time you open your mouth, that's a new thing that's been synthesized." Speaking cost almost nothing and kept producing new ideas.
• Breathing. For me, a few slow breaths change how clearly I think. Almost no effort, a real change in state.

The same thing showed up in tennis long before I had words for it. As a junior I lost a tournament match badly to a player who kept hitting drop shots I could not handle. When I got home, I spent about three weeks doing almost nothing but learning the drop shot. Three weeks of focused practice, and I have had that shot for the rest of my life. That is a small effort buying a change that never wore off.

None of these are clever. That is the point. The strongest levers are often the cheapest ones, and they are easy to overlook because they cost so little.

The same ratio in big decisions

The ratio matters most when the stakes are high. For about two years I built software on a heavy foundation that I designed myself. Every new tool had to be rebuilt to fit it. It took enormous effort, and for a long time I believed the payoff would justify it.

Then I asked one plain question: what is the least effort that gets the same result? The answer was that the tools the AI needed already existed. It could use them directly. I did not need the foundation at all. My own summary: "I just saved 2 years of your life because I asked the right question."

That is why asking the right question is one of the strongest levers there is. A question costs a minute. The right one can delete months of work you were about to do.

Well-known builders use the same ratio. Elon Musk put huge effort into rockets that land and fly again, because reusing a rocket changes the cost of every launch after it. The effort was large, but the change it bought was larger. Albert Einstein spent years on one set of ideas about space and time, and those ideas changed how people understand the universe. High effort can still be a strong lever when the change it produces is far bigger. As I said on the walk: "You can still have high energy, and then still have such massive output that it's like, wow."

The mistake is not high effort. The mistake is high effort for a small change, when a smaller effort was available for the same result.

How to find your strongest lever today

Here is the method I use. It takes about ten minutes.

1. Write down what you are pursuing and where it stands right now, in one sentence each.
2. List every move you could make this week. Do not judge them yet.
3. For each move, write the change it would create if it worked. Be concrete: what would be true afterwards that is not true now?
4. For each move, write a rough effort: minutes, hours, days or weeks.
5. Circle the move with the biggest change for the smallest effort. That is your strongest lever.
6. Before you start, ask one more question: is there an even smaller move that gets the same change? If yes, do that instead.
7. Do it today, then check whether the change actually happened.

The sixth step is the one most people skip, and it is where most of the savings are.

What to watch out for

A lever can also move you the wrong way. A small decision can lock you into months of work that leads somewhere you did not want to go. So when you weigh a move, count the effort it will keep costing you later, not only the effort to start.

The change you expect is also a guess. You might believe a big project will pay off hugely, and it might not. The answer is not to avoid big bets. It is to look for the smallest test that tells you whether the change is real before you commit everything to it.

Finally, the ratio works at every size. Changing your own morning with a coffee and a walk is small. Changing how a whole industry works is enormous. The idea underneath is the same, "Use the least amount of energy possible, get the most done."

The short version

• The strongest move is the biggest change in state for the least effort.
• Measure change, not hours or tasks.
• The cheapest levers (a question, a walk, a conversation) are the easiest to miss.
• Before you start, ask if a smaller move gets the same change.
• Count the effort a decision will keep costing you, not just the effort to begin.