This article from Pfizer discusses how to improve your wellness through exercise, nutrition, sleep, and mindfulness. 

This article from MedicineNet explains that wellness is a multidimensional concept that includes physical, intellectual, emotional, environmental, social, and spiritual wellness. 

This article from UMKC School of Medicine discusses how wellness is more than just physical activity and good nutrition, and includes positive choices and a sense of fulfillment. 

This article from the Global Wellness Institute defines wellness as an active pursuit of activities, choices, and lifestyles that lead to a state of holistic health.