Any advice you’ve ever heard or given. I linked a great video that I think would be my answer, combined with the “stop caring what other people think about you” and “comparison is the thief of joy” comments below. Just do stuff that you wanna do, don’t compare and don’t care what others say. It’s awesome advice.
Say what you mean, mean what you say.
If its in doubt or you’re conflicted, say no.
For everything else there’s maybe