Make sure it compiles before you make too many changes

When you're in the heat of coding, it can be difficult to stop typing and click that "build" button. You may think "Oh it's just a small change. I'll check if it runs later." The problem with this comes when you do it over and over again. The more changes you make, the harder it is to revert back. If you run into an error later down the line, it'll be difficult to figure out where it went wrong.