To lose weight without exercise, focus on these key strategies: eating more slowly and chewing thoroughly to reduce food intake, preparing and eating more home-cooked meals to control ingredients and portions, increasing intake of fiber-rich foods to boost fullness and reduce hunger, drinking water regularly especially before meals to reduce calorie intake, and managing sleep and stress for better hormone regulation related to appetite. Additionally, consuming enough protein helps with satiety and maintaining muscle during weight loss. Avoid sugary drinks and practice portion control for best results. These lifestyle and dietary changes together can effectively promote weight loss without needing exercise.