You need to pay attention to the slot games that have the highest RTP (Return to Player). RTP is a digit that represents your slot machine odds. It is expressed on a scale of 1 to 100. And slot machine games that usually offer an RTP of more than 90 are considered to be the best to select.
The truth is that there is no trick to slot machines. They provide random results based on set mechanics and it all comes down to luck. With that being said, not all games are the same, so picking the right options is key, and you can still change the size of the bet throughout the session for better results.