Don't be afraid to tackle things you might think are out of your league.
Learn the apps infra. (You dont have to be devops, but understanding the whole picture helps with the event/request lifecycle. This will help you debug outside of your normal in app context)
Realize that you know more than you think.
Give yourself more credit.
Don't ever let someone tell you that you are 'almost there'. You are there, and you are killing it.
Have the goal to leave the company in a better position than you found it.
Realize they would not be there without your contributions.
Don't compare yourself to others. You are you, and you freaking rock.
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Sure plenty of tips.