This is classic WT double-speak. To an outsider this all seems reasonable. But to an insider the points listed really mean:
1. Follow the treatment prescribed by qualified mental-health professionals.
Take the pills the doctor gives you to numb the pain of living in this system.
2. Maintain a balanced and stable daily routine.
Read the text and WT litteratrash daily. Keep a tight leash on your mind and your family.
3. Stay physically active.
...by going out preaching.
4. Get enough sleep.
About 4 hours will be enough since you have to work crappy low-paying jobs and spend hours slaving for a cult.
5. Take time each day to relax.
Sitting on a chair in the KH is all the relaxation you need.
6. Eat a nutritious and balanced diet.
Bread and water is a balanced meal according to scripture.
7. Limit alcohol consumption and drugs that are not prescribed for you.
If asked, say you drink in moderation. However much liquor it takes to wash down your pills is your own little secret.
8. Avoid isolation; spend time with people whom you trust and who care for you.
Only spend time with other JWs in good standing. KH meetings are all the socializing you need.
9. Give attention to your spiritual needs.
Stay completely connected to the bOrg.