[bootstrapper101]

Don't over think. Just start building anything that you feel could be useful to someone.

Don't fall in love with the idea. The idea you start with will never be the idea when you are successful. It will evolve or likely you will pivot to another related idea. Facebook today isn't what it started with. Flickr and Slack started as gaming companies. Google today is very different from what they started with.

It would help if you pick a good space. Ideally something which you know about, is big enough that there would be enough users.

And make sure you enjoy the process of going for it. If you set out with a sole goal to get rich and get famous, it can be very demotivating when things are not going your way.

[AussieWog93]

I've seen people take the advice of "build something that could be useful to someone" the wrong way so many times. That "someone" shouldn't be an abstract, hypothetical customer but a group of people that contains someone you intimately know, such as a close friend, partner or yourself. I think "build something that would be useful to someone that you personally know, and many others like them" is a much more concrete way to think about the problem, and will enable you to achieve success with high probability.

(Just as a disclaimer, I started earning enough income from side projects for both my wife and myself to quit our full-time jobs about a year ago and start a family, but we're nowhere near the multi-millions in yearly profit that OP or bootstrapper10x are.)

[bootstrapper101]

This is excellent advice. You should know and understand who your customer are. Otherwise you won't even know what to build. Or you will build the wrong product and won't get any feedback.

Congrats on your journey and best of luck for the future!

[AussieWog93]

Thanks mate, really appreciate the encouragement from someone who's made it.