Many times it becomes very confusing to read and understand the code. Your application becomes complex and messy with the nesting structure of your code.
Think of the bigger picture to analyze the smaller details of your application. This will help you to understand the architecture of your software and its various components.
One of the toughest parts of software development is choosing a relevant name for each piece of code. You need to pay attention carefully to the variable, class, or method names.
A lot of developers avoid commenting on the code or documenting the things in their application.
In development, most of the time developers write some code and later they comment out that massive block of comment just because they are less confident about it.
Do not underestimate the importance of code reviews in software development. A great developer always spends a good time on code reviews.
A lot of developers avoid testing considering it a time-consuming process but good developers never run away from testing.
Good developers know that having a good grasp of fundamentals is more important than over-focusing on language syntax.