Eating a diet balanced in protein, complex carbohydrates, and essential fatty acids is important to maintaining healthy brain function. Our diets are too high in simple, refined carbohydrates. Load up on antioxidants in fresh vegetables. Eat plenty of fish filled with healthy omega 3 fatty acids. Get plenty of B vitamins necessary for a healthy nervous system by eating lean red meat and a variety of fresh produce.
Depressed people tend to isolate themselves.
This reinforces feelings of hopelessness. A good antidote is to get out and socialize with people you trust. Have a good time, go dancing, do active things you enjoy. Socializing serves to increase interpersonal bonds and feelings of hope and acceptance. Getting out also increases energy levels.