How programmers find their startup ideas

Due to another discussion here on Indiehackers with regard to how to find a problem worth solving, I remembered previously having similar discussions with developers, and that I actually put down some thoughts in writing.

You know how to code, you know how to build a product, and you know how to launch it - but you seem to always struggle coming up with an idea.

That is exactly the scenario to overcome, and why I wrote the article How programmers find their startup ideas.

By doing this, I literally have filled a notebook with viable business ideas (some small, some bigger). Some have turned into actual projects with profit, others hobby projects, and of course - some have not stood the test of time and have been scrapped.

What approach do you have?