Something I rarely see anyone do is use the Refactoring features in their IDE.

Most IDEs understand the AST of the code you’re working with. Knowing the AST allows it to restructure that tree, based on some simple commands.

One command is rename. You can rename variables, functions, classes, files, you name it. Your IDE should update all your code automatically.

Extract and Inline are two other useful commands.

Learn the keyboard shortcuts and you’ll feel like a wizard. It’s honestly close to magic.