Your Best Tips for structuring a New Project

I'm a backend developer looking to start a greenfield Next.js project. I'm an experienced developer but pretty green on UI projects generally.

I've worked in Node with just a smattering of Vue years ago. I plan to use Typescript.

I'm not worried about getting something working but I want to structure it so that it is easy to maintain?

What are your tips for structuring a Next.js project? What are some ptifalls? Good patterns? Patterns to avoid?

Happy to hear any comments, advice, just good references.