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.
The modern slot machine does not have any built-in memory and generates hundreds of numbers per minute. The lack of memory means the algorithm used to generate each number is completely independent of each reel on the slot machine.