Differentiation Handbook Product Research 
Lenny Rachitsky
APRIL 20, 2025
When building AI products, invest as much in UI/UX design as model quality—Windsurf’s experience shows interface changes alone can triple adoption rates. Get your hands dirty with AI tools immediately—the competitive advantage gap between AI tool users and non-users will dramatically widen in the next year.
The Secret PM Handbook
MAY 18, 2017
Even if it’s basic knowledge that everyone knows, putting it in your product will make your product more valuable. Any product that has a setup wizard or onboarding process. Compare what they delivered in their product versus what their competitors delivered. There are a ton of good examples: Instagram (filters).
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The Secret PM Handbook
MAY 5, 2017
One of the most challenging questions about product management has been – in my experience – “What is Product Management?”. We’re called “product” managers. We’ll start with a box labeled “Product.” I suspect most of what you’ve learned about product management thus far has revolved around “the product.”
Product Innovation Educators
MARCH 27, 2023
Lessons for product managers from PDMA’s Outstanding Corporate Innovators Award Every year the Product Management and Development Association (PDMA) recognizes an organization with the Outstanding Corporate Innovators Award (OCI). Summary of some concepts discussed for product managers [3:04] Why was the OCI award created?
The Secret PM Handbook
SEPTEMBER 16, 2016
In this part we dive into what you really came here for – product management-specific mental models. Why are product management-related mental models different? The mental models I’m going to talk about share two key characteristics: They are about about products. Who the product is for (the market).
The Secret PM Handbook
MAY 5, 2017
One of the most challenging questions about product management has been – in my experience – “What is Product Management?”. We’re called “product” managers. We’ll start with a box labeled “Product.” I suspect most of what you’ve learned about product management thus far has revolved around “the product.”
The Secret PM Handbook
OCTOBER 9, 2018
Co-opting product management into sales. My good friend Geoffrey Anderson ( @ganders2112 ) recently wrote about a situation we product managers sometimes find ourselves in. When sales are not going well, company leadership might ask product management come in to help hit the numbers. This can be a bad thing or a good thing.
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