1. Introduce continuous integration. 2. Slice up the codebase with encapsulation. If you have something that is incredibly tightly coupled that you can't refac

1. Introduce continuous integration. 2. Slice up the codebase with encapsulation. If you have something that is incredibly tightly coupled that you can't refactor, just put a bubble around it. 3. Base all of your optimizations on statistical analysis of your logs. If you don't have log data to that level, introduce some RUM.