One of the most positive steps you can take is to learn to recognize these illnesses and reach out for help. Often, people feel a little better just by acknowledging a problem and taking some action. Keep busy, but don't over-do it Take control of your life. Identify the sources of your problems and address them. Be with other people.
Social interaction is a necessary part of good emotional health.
Eat healthy foods. Make sure you are physically healthy. If you haven't had a check-up in a while, get one.