[Havoc]

Build something that solves a problem you have right now. Even if it's a trivial problem and nobody else will be able to use the solution except you.

That forces you to think real world usability etc

[aliceryhl]

I see this recommendation rather often, but it's rather unhelpful. I certainly can't think of any such problem that I have.

[emoII]

Well it doesn’t have to be that hard, you just have to come up with a problem that is not actually a problem for you, making it very trivial. An example: right now it is sunny outside, so what if I could build a service that notifies me of the time for sunset every day.

It doesn’t have to be a problem with actual value to anyone, but once you start thinking about it, you will probably find it engaging to solve.

[Havoc]

Feel free to make a more helpful suggestion!