I try to design my problems first, then my questions, (what data will I be looking for, how is it related) [i.e. define the schema, it doesn't matter if it's a

I try to design my problems first, then my questions, (what data will I be looking for, how is it related) [i.e. define the schema, it doesn't matter if it's a single object or a database]; then my interfaces, and then I build all my code as if every interface worked as planned. Then I fix my interfaces, because things change in production; Then I fix my other code. I usually start coding in the middle, not all the detail things, and not the giant core things, with some general drivers for the giant core things until they are built.