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The curse of the validation mindset
And the other muscle we never train for
Jul 8
•
Jeroen Coelen
5
2
25 founder side quests to avoid
And 38 things to do instead
Jul 1
•
Jeroen Coelen
5
June 2026
Ultimate Guide to Interviews #6: Spot the gaps through narrative prototyping
Revealing the hidden ingredients for your PMF & GTM
Jun 24
•
Jeroen Coelen
7
Most founders get PMF & GTM wrong. With these 15 frameworks, you won't.
My handpicked selection of fundamental reads
Jun 18
•
Jeroen Coelen
6
2
How I went from zero outbound to 28% reply rate on LinkedIn
How I went from zero outbound to 28% conversion rate on LinkedIn
Jun 10
•
Jeroen Coelen
8
1
Measuring customer-problem fit
What customers say and what it means for their problem urgency
Jun 2
•
Jeroen Coelen
15
1
May 2026
The 17th century bubble that foreshadows AI's fate?
Three ingredients that fuel every market frenzy, including AI
May 27
•
Jeroen Coelen
7
1
Dear founders, please stop saying "Based on science"
It's not the flex you think it is
May 14
•
Jeroen Coelen
4
Why referral marketing often is a bad idea
It doesn't boost sales like you think it does
May 7
•
Jeroen Coelen
7
2:45
April 2026
There are 100 leads among your current connections. Here's how to access them.
Unlock your dormant CRM with Prateek’s Low-Hanging Fruit Method
Apr 29
•
Jeroen Coelen
7
1
We haven't learned nothing
Why the 'flat line' of startup survival is setting us up to develop the wrong medicine
Apr 22
•
Jeroen Coelen
4
5
18:36
Do you suffer from delegation stagnation?
Shift from handing out tasks to outsourcing problem ownership to really clear headspace
Apr 14
•
Jeroen Coelen
4
1
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