Knowing when to quit playing slots hinges on a combination of self-awareness and discipline. Players should set clear budget limits before starting and be mindful of their spending; if they reach their predetermined loss limit, it's a good sign to walk away. Additionally, recognizing emotional states is crucial; if frustration or desperation sets in, it’s wise to take a break or stop altogether. Similarly, if a player starts to feel that they're chasing losses or spending more time than intended, it’s often a sign to quit.