Avoid non-repeating code and instead divide your code in to multiple functions. Nmae your functions and variables well so it's clear what they are meant to do. Keep your code consistent so when someone new joins the team and looks at the codebase it's easier for them to understand whats going on. Keep commits short so bugs are easier to spot and code reviewing wont take super long. Add a message to your commit (what you changed). If necessary add comments to your code to clarify your thought process behind your solution.