Tired of wasting money on marketing that just doesn’t work? You could be doubling your sales but you’re probably making this one critical mistake.

The secret weapon is scientific testing. In this article, you’ll get five tips to double your sales in under a year. I’ve used this method to scale multiple businesses to millions of dollars.

We’re going to ditch the guesswork, embrace the science, and I’ll even give you a free tool to make it all easy.

Understanding the Power of Continuous Testing

A study by Koning, Hasan, and Chatterji in Management Science (September 2022) showed that continuous testing can boost customer visits to your website by 10% within just a few months. This compounds to a 30% to 100% jump after a year. That’s doubling your prospects just by testing using the scientific method.

I launched an e-commerce business with just $500 in tests over four months, and I scaled it to over $2.9 million in profit (and still counting).

This is how you do it: small directional tests that are fast and cheap.

The Common Mistakes in Testing

Most businesses do testing wrong. They change too many things at once, spend too much money, and wait too long. Here’s the right way to approach it with five essential tips:

1. The One Thing Rule

Test one thing at a time. This is known as isolating variables in science. It means to test one thing on each test – maybe it’s the headline, the color of a button, or the picture on a webpage. Pick one (and make it one that counts – something that can move the needle). Don’t change everything at once. If you do, your tests will either take too long, cost too much, or won’t provide useful information.

2. Directional Tests

This is my secret weapon. A directional test is a small tweak with a small budget that gives a big impact. Use my free Sell More with Science flowchart to pinpoint exactly where your business stands, whether you’re a startup or looking to scale. For instance, a quick $50 directional test based on that chart can tell you if your credibility messaging resonates. In under 24 hours, you’ll know if it’s a winner or a dud. No more wasting ad spend.

(image below – full download can be found here)

3. Don’t Get Fooled

Don’t bail on a test too early. Directional tests are great for eliminating duds, but for promising ideas, you need statistical significance. This means making sure your test runs long enough to give you reliable data.

4. Profit From Failure

As Thomas Edison famously said, “I’ve not failed, I’ve just found 10,000 ways that don’t work.” Negative testing is about actively seeking failure quickly. Each time you test something—a bad headline, a rejected offer, or an ignored image—you get closer to what works. It’s about eliminating all the things that are wrong and focusing on what truly works. You’ll generate more cash by quickly eliminating ineffective options.

5. Assume You Know Nothing

Test everything. You think you know your customer? Test it. You think you know what they want? Test it. Assume you know nothing because until you test, you don’t know. In one of my businesses, we actually place bets on every test to see which headline or offer will win. Guess what? We’re almost always wrong. Testing is the key to unlocking true customer insights.

Conclusion

No more guessing. No more dart throwing. You have control and predictable growth. It’s not luck; it’s science. This approach works for every area of your business.

Next Steps

Want to dive deeper? Download my free resource: Sell More with Science. You can also explore my Scale with Science Mini-Masterclass for more insights.

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