Parkinson's Law: what it is, who uses it, and the best notes

Lenny’s Podcast109 min

Slack founder: Mental models for building products people love ft. Stewart Butterfield

Stewart Butterfield · Nov 20, 2025

Key learnings

Plot features on a utility curve to see whether extra investment is still on the steep part of the value gain or has reached…
Judge a product by whether users understand what it does; in many places the real challenge is comprehension, not friction, so…
Cultivate taste deliberately: taste can be trained, and leaning into craft can become a competitive advantage that less-attentive…

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Lenny’s Newsletter · Free post♥ 145

How a traumatic brain injury made me a better PM—and person

Jun 6, 2023 · 27 min

“If you’re getting this post, that means my wife’s due date is very near (😮‍💨), or our kid was just born (🥹). To give my new family my undivided attention, I’ll be taking a month or so of parental leave. To make sure you continue to receive exceptional value from the newsletter during this period, a few months back I put out a call for guest posts. Out of 500+ pitches, I whittled it down to six extraordinary posts. Today’s post is…”

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Lenny’s Podcast150 min

How Shopify builds a high-intensity culture

Farhan Thawar · Dec 19, 2024

Key learnings

Choose the harder path when options are close: even if it fails, you gain skills and work with stronger people, whereas the easy…
Write down a personal framework of what you care about in a job, and use it to filter opportunities and decide when to leave a…
Build intensity by producing more output per minute rather than adding hours; a focused hour with strong people can outpace a…

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