1. Clean up formatting
The overall format of your code is what makes it possible to quickly navigate to areas of interest. Consistent indentation, line breaks, and patterns help programmers skim large chunks of code. Take the following sloppily formatted code for example:
Read on for the rest. This has analogues in every language: the goal is to create simple, concise, easily scannable, and human-readable code which also correctly solves the relevant business problem.