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A learning a day, since May 12 2008, by Rohan.
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None of your business

2025-10-08 19:33:00

One of the biggest challenges of our uber-connected lives is remembering this simple truth: the only business worth focusing on is our own.

That means not counting someone else’s money.

Not chasing someone else’s milestone.

Not wishing we had their vacation, their house, or their version of “success.”

The only sustainable path to a life well lived is to focus on the sequence of steps in our journey – and tune out the rest. Everything else is noise.

“Mind your own business” might have once sounded like a harsh takedown.

Today, it might just be the most valuable piece of feedback we could ever receive.

Dancing vs. emailing

2025-10-07 19:36:00

“Dance like nobody’s watching… but text, email, and post like it will be read in court someday.”

A lawyer I know shared this twist on a classic saying.

Funny and true.

3 reflections on careers – for high school students

2025-10-06 19:22:00

A couple of years ago, I had the opportunity to speak with middle and high school students. It’s always hard to know what will resonate at that age, but I shared these three reflections:

1. There is no one path. Careers don’t follow a straight line – they zig and zag in unexpected ways. Most importantly, everyone’s journey looks different, and that’s okay. The real work is in being curious, figuring out the path you want to take, and making sure you take the best next step.

2. Hard work is just the entrance ticket. Hard work doesn’t guarantee success, but without it, your chances drop dramatically. Opportunities have a way of showing up after you put in the work.

3. A healthy body and a calm mind are the foundation. No matter what career you pursue, everything rests on your physical and mental health. Your energy, sleep, fitness, and peace of mind are the foundation on which you build your career and impact over the long run.

Given their age, it felt too early to talk choosing your life partner. That would be #1 on my list. Great partners are like great teammates – they complement us and make 1+1 > 2. That choice shapes more of your life – and your career – than you might imagine.

Oceans – Sir David Attenborough

2025-10-05 19:54:00

We watched the one and only Sir David Attenborough’s Oceans on Netflix recently. It was both sobering and awe-inspiring. 5 reflections:

1. Industrial fishing is devastating. There is a segment in the documentary where you just follow a trawler/dredger under the ocean. These vessels and their equipment don’t just harvest fish, they bulldoze entire ecosystems, tearing up sea beds and discarding huge amounts of life.

“Overfishing” feels too mild a term for the scale of destruction. It has made me think differently about seafood.

2. Phytoplankton absorb more carbon than all the world’s forests combined and generate about half the oxygen we breathe. Yet only ~2–3% of the ocean is effectively protected, far short of the 30% global goal by 2030. Protecting the ocean is about climate balance as much as biodiversity.

3. Oceans have magical powers of recovery and protection leads to spillover gains. While the section on industrial fishing definitely evokes feelings of despair, Sir David Attenborough goes onto show examples where protection of marine ecosystems has enabled marine life to rebound.

Sanctuaries in Hawaii, Scotland, and the Channel Islands demonstrate the “spillover effect” – when ecosystems recover inside marine reserves, life spills outward, strengthening surrounding waters too.

4. Inspiration can drive real change. Greece just announced two National Marine Parks covering ~27,500 km² (about the size of Belgium). Bottom trawling will be banned there, and Prime Minister Mitsotakis explicitly cited Oceans as inspiration. It’s a reminder that stories and images can catalyze policy.

5. The ocean’s fate is humanity’s fate. The health of our oceans shapes global weather systems, food security, and planetary stability. I appreciated that Sir David Attenborough didn’t sugarcoat the destruction – he shows it plainly, alongside beauty and hope. The message is clear: the next few years are critical. Bold action now can still bend the curve toward recovery.


Watching Oceans left me shuddering at the destruction but also hopeful about the possibility of renewal. Sir David Attenborough makes the main takeaway plain and simple – the ocean is not just something we protect, it is what protects us.

AI wave – the what and the how

2025-10-04 19:20:00

There’s a lot of talk about AI hype. I don’t know enough about the financial bubble aspect of this (though I thought Azeem’s framework was helpful). But, as far as its impact on the products we use go, it is understandable to see it dismissed as hype because it feels just like a technology wave we’ve seen in the past two decades – like mobile or cloud.

But I think there’s a difference. Mobile and cloud changed what was built. They didn’t fundamentally change how software was built.

The internet, on the other hand, changed both what was built and how it was built. Software built for the web was fundamentally different than software built for Desktop applications.

The AI wave, to me, feels closer to the internet wave. We’ll see new kinds of products and new ways of building.

When you combine those shifts and remember that the scale of this wave builds on the scale of the mobile internet, it becomes easy to imagine just how much disruption lies ahead.

It’ll take a while to play out. But play out, it will.

Stats on professional fighting

2025-10-03 19:14:00

I was speaking with a professional fighter the other day, and we drew a parallel between making it to the highest levels of professional fighting and building something new.

The stats are brutal – the odds of success are impossibly low. If you believed only the stats, you’d never step into the ring, or start building at all.

At the same time, the stats are useful. They help set realistic expectations, so you don’t hold yourself to an impossibly high bar or confuse difficulty with failure.

But stats are only one piece of the story. The rest of the story is written by those willing to take the shot.