Skills · 15 June 2026 · 3 min read

How to Change Your Mind When the Data Says So.

The best sellers change their minds when the numbers say to. Here is how to test a belief about your own selling, swap a habit that is not working, and trust the results.
Will Koning
Will Koning
Founder, meritt
meritt illustration: self awareness & growth mindset

I have watched smart sellers run the same play for months while their numbers quietly fell. They were not lazy. They just believed in the plan. But belief is not proof. Knowing how to change your mind when the data says so is one of the fastest ways to get better. It costs you nothing but a little pride.

The mistake most people make

Most people fall in love with a plan and hold on too long. They keep dialing the same list, using the same pitch, sending the same email. The results say it is not landing. But they tell themselves it just needs more time, or that the market is soft. So nothing changes. You can feel busy and still be stuck. The plan is not failing because you are unlucky. It is failing because it stopped working, and no one looked at the numbers.

What good looks like

Good sellers treat their own habits as guesses, not facts. They watch the numbers, and when the numbers say a thing is not working, they switch. No drama. No ego. They do not need someone to force them. They just follow the evidence. It feels less like giving up and more like being honest with yourself. That is the whole skill.

How to do it

Pick one belief and check it against your numbers

Choose one thing you believe about how you sell. Then look at your real data and ask if it holds up.

"I believe morning calls connect best. So let me pull last month and check: did mornings actually beat afternoons?"

Try the opposite once and compare

Run your usual way and the opposite way side by side. Keep the rest the same so the numbers mean something.

"This week I'll call afternoons instead. Same list, same pitch. Then I'll see which slot booked more meetings."

Let the result win, even if it stings

If the data beats your belief, change your plan. Do not argue with it. Thank it.

"Afternoons booked twice as many. My gut was wrong, so I'm moving my calls."

See the difference

Weak

"I know cold email works for me, so I'll keep sending the same one." Reply rate has been near zero for six weeks, but you have not looked. You are guessing and calling it experience.

Strong

"My reply rate dropped to almost nothing. Let me test a shorter email against my long one for a week and read the numbers. If the short one wins, I switch. If it loses, at least I know."

Same seller. One follows a feeling. One follows the facts. The second one gets better every month, because every test teaches them something true.

How you'll know it's working

You have got this when you switch your approach because the numbers told you to, not because someone made you. Look back at your last month. Did you change one habit after seeing the data? Did the new way beat the old way? If yes, you are there. Changing your mind on evidence is not weakness. It is the most useful habit a seller can build, and it pays off for the rest of your career.

Questions people ask

How do I know when to change my sales approach?

Change it when your own numbers say it is not working, not when you feel like it. Pick one habit, look at the data behind it, and compare it to a different way. If the new way books more meetings or wins more replies, switch. The big mistake is holding on to a plan because you believe in it, while the results quietly say to move on.

How do I test one of my own sales habits?

Run a small, fair test. Keep everything the same except the one thing you want to check. For example, send your long email to half your list and a short email to the other half for one week, then compare reply rates. Change only one thing at a time, or you will not know what made the difference.

What if the data says I was wrong?

That is a good day, not a bad one. Being wrong on a guess means you just learned something true about how you sell. Thank the result, change your plan, and move on. The sellers who improve fastest are the ones who let the numbers win, even when it bruises their ego a little.

How is this part of coachability?

Coachability means you take in new information and act on it. Changing your mind when the data says so is coachability you give yourself, with no manager needed. meritt's four-trait framework treats this as a core strength, because a seller who follows evidence keeps getting better long after the training ends.

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