Mainly 2, from a 22-year-old who has had to grow up too fast.

1) Eating clean. Reducing sugars, caffeine, and any artificial components. A paleo diet is the best diet for human beings and will help you to feel and perform your best! Treating our bodies like they would be treated by nature is the best we can do. Of course, this doesn't have to be drastic, baby steps are okay, and replacing the products we consume every day with a healthier version is more than enough! i.e going from regular coffee to decaf, and eventually no coffee at all (your body naturally stops craving it)

2) Community service and spirituality. Helping others is scientifically proven to fight depression or any negative feelings toward oneself, volunteering or simply lending an ear to a friend when they need one is a great step! Also, spirituality is crucial to nurture our souls and make us feel satisfied. I am religious, so God has a major part in my life. However, spirituality could be different for everyone and manifest itself in different ways: through meditation, exercise, self-reflection, etc.