Break dance after every good move.
What was the best advice given to you in chess

I went like 200 points up on my chess ability (probably from around 1000 to around 1200) after a game I played with a friend when I was 16.
As kids he used to beat me all the time. Then slowly, growing up, I got closer to his level, and by the time I turned 16 we were pretty equal, and the games were interesting.
One game, he was ferociously attacking me, and at some point he forked my rooks with his B. They defended each other so I didn't move any of them and played something else.
I was very surprised, when at his move, rather than take a rook (a valuable piece!) he took an undefended knight with his B... of course I 'knew' that a rook is much more valuable - even if he has to give up his bishop in order to get it... lol
After a few more moves (down a knight), it was clear that his attack was over and that I was not going to be checkmated.
I said to him, very contentedly - "your attack is over!".
He answered - "yes, but you're totally losing."
I went - "How's that?"
And then he spilled the beans! Having attended a chess course as a kid, he knew and told me for the first time, that not only rooks and queens matter materially - but that everything does, and going down material equals a certain loss, in the absence of compensating factors. I learned then and there that I should even watch my pawns! Not to mention knights and bishops... which up to that point, I thought that they were only some kind of props to the "actual show", put on by the majors.
After that game, he started to complain that "every time we make exchanges, a piece of his disappears..." - simple - I started to calculate. This was the turning point in our chess relationship, and after that point the results started to tilt heavily in my favor.
I used to take chess far to seriously. It was spoiling my enjoyment.
Someone recently helped me slow down my attempt to improve and I am now enjoying chess more than ever.
So his advice to not take it so seriously helped me enjoy the game.