Know which slot locations to try. Casinos want players to see other players winning. It's good advertising. Such locations include crosswalks, elevated carousels, and banks of slots near the casino bar, lounges, change booth, and coffee shop. Know which slot locations to avoid.
Winners here have little advertising value for the casino.
Also avoid all non-gaming areas, such as airports, bus terminals, gas stations, drug stores, and cruise lines. It's not their money you're playing with. Know the role of luck. And luck is either with you at any one time or it isn't. If it's not, it won't matter what strategy you use or what you do.