Use a linter, a formatter or any other tool that complains early and often. Have a starting setup for each programming language. Being surrounded by a supportin

Use a linter, a formatter or any other tool that complains early and often. Have a starting setup for each programming language. Being surrounded by a supporting environment helps. You don't have to start with a blank document in a dumb editor. Pick an IDE that you like. I really like PyCharm but vscode is also quite great. To that extend you might even go further and have some specific visual clues per programming language. Whether that's different editors, editor profiles / themes depends on you.