Preparing my mind

• Easy to Learn tech but hard to learn ways of thinking.
• Learn to read good code in order to write good code.
• Legacy software is a big problem.
• Build good mental models around your code ( Your philosophy and ideologies around code and engineering )
• Become a good debugger.

Correctness vs Performance

• Make it correct first, then make it concise and fast.
• Make a draft, make it quick and make sure it works, only after that you should worry about performance.

Design Guidelines

• write less lines of code.
• handle error anywhere error is possible.
• code must be readable - if someoone else reads your code, they should be able to understand it with low effort.
• the average programmer on your team should be able to have a mental model of the entire codebase.