My first few good pieces of poker advice came from my father when I was seven or eight years old. They were simple, almost common sense pieces of advice like "You don't have to play every single hand. You can always thrown bad hands away." He told me that no matter what the game is, stud, draw, hold 'em, the better the cards you start with, the better chance you have to win the hand in the end. He also taught me to play aggressively, to put pressure on the other players and let them know not to expect to see the whole hand for free.
But I did get one rather good piece of advice from Erick Lindgren. I was watching one of his videos in which he reviewed several hands. I don't remember most of what he talked about, but one thing he said stuck in my head. "Always give your opponent a chance to
bluff at it." The next time I was playing, I was in a hand. I raised pre-flop and connected on the flop and led out. I got even stronger on the turn, but there were a couple of draws out there, so I continued to bet. When none of the draws got there on the turn, I recalled what I had heard Erick Lindgren say, "Always give them a chance to bluff at it". I was confident that I was holding the best hand and assumed that my opponents would fold if I bet the river. But if I checked, my opponent would surely assume that, with his busted draw, his only chance of winning the hand would be to bluff at it. So I checked and he over bet the pot. I snap called his bluff and took down a rather nice pot. I have been employing that little piece of advice ever since. And because so many players have a tendency to get carried away and instead of making a reasonable sized bluff that might look like a value bet, they tend to bluff their whole stack, some of the biggest pots that I've won have been won utilizing that one little piece of advice.