When you enter a casino, remember that you are entering a place of business run by very shrewd business people who understand human emotions.
The majority of casino players leave too much to chance when playing in a casino. To put it bluntly, they don't have a clue as to how to play.
Most players unfortunately go to the casinos with an attitude that makes it even easier for casinos to psyche them into losing. Most except to lose; therefore, it's not too surprising when they achieve their goal.