For code I usually use

~/Code

  ~/projects # for projects that span multiple languages

  ~/courses # For the various programming courses

  ~/valet # PHP projects using Valet+

  ~/devilbox # For Dockerized

  ~/elixir

  ~/node

  etc...

For notes I use Inkdrop and split things by hobbies/projects.

One thing I've been having trouble organising is photos. More specifically, organising original and retouched versions. I've come across one solution which is to do this:

~/Photos/

  2018/

    SpringOriginals/ # Keep original photos here.

    SpringAffinity/ # Save Affinity Photo files here

    SpringExports/ # Save exported re-touched photos here

I quite like this solution, but I'd be interested in knowing if there's anything better.