What was the most important takeaway from your first startup/sidegig/product?

My biggest learning was "Do not let the absence of a prototype or beta prevent you from engaging with your target market. Instead, figure out ways to engage your future community on existing platforms — newsletter, social, Product Hunt — before writing the first line of code. Because you'll need those folks to critique what you're building from day one."

I have learned to be objective towards my product and my approach to customer acquisition. Most users if not all are not as excited as you are about your product. "wouldn't it be cool..' usually don't resonate with new users unless you are providing the right/most convenient solution to their problems.

Choose your partners wisely.

Get rid of a problem when it's still tiny.

The most important takeaway from my first product is: «Nobody can build a good product without iterations. Relaunch like a pro. Iterate again and again toward product-market fit. Continue improving on your solution until it actually solves a problem.» Now, I'm building my current product https://getlanding.io with this mindset.

Stop reading yet more "how I did it" and "follow these tips" stuff. JFDI

Having strong opinions but loosely held! Basically, having a vision/ hypothesis about your product but being able to adapt it with changes in user behaviors

Overselling and underdelivering is a house of cards, focus on delighting your customer with every feature you ship.