How do I have a successfully career in the programmer industry?

I’m about to start a job as a programmer and I was wondering what tips, guidance and advice anyone has in order to have a good career in the area. I’m up for any advice whether it be general or specifically in the area of programming.

Please tell me your experiences in your careers, what helped you in hindsight or what you look back and think “I wish I knew to do that at the time”.

Thank you.

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