Here is a comprehensive plan of action to help a youth who is under the care of professionals having been diagnosed with symptoms of schizophrenia and schizoaffective disorder to manage their symptoms:

1. Be supportive and understanding.

• Let the youth know that you are there for them and that you understand what they are going through.
• Let them know that you are not judging them and that you want to help them.
• Listen to them and offer them support.
• Encourage them to talk about their feelings and experiences.
• Help them to find coping mechanisms for dealing with their symptoms.

2. Encourage them to follow their treatment plan.

• Help them to understand their treatment plan.
• Encourage them to attend their appointments.
• Help them to take their medication as prescribed.
• Monitor their symptoms and report any changes to their doctor.

3. Help them to manage their symptoms.

• Encourage them to get enough sleep.
• Encourage them to eat a healthy diet.
• Encourage them to exercise regularly.
• Help them to avoid alcohol and drugs.
• Help them to manage stress.
• Help them to develop a support system.

4. Be patient and understanding.

• It may take some time for the youth to adjust to their diagnosis and treatment plan.
• Be patient with them and understand that they may have setbacks.
• Encourage them to stay positive.

5. Encourage them to stay positive.

• It is important for the youth to stay positive and to believe in themselves.
• Encourage them to set goals and to work towards them.
• Help them to find things that they enjoy doing and that make them happy.

6. Be a role model.

• The youth is looking to you for guidance and support.
• Be a role model for them by living a healthy and positive lifestyle.

7. Seek professional help if needed.

• If the youth is struggling to manage their symptoms, encourage them to seek professional help.
• There are many resources available to help people with schizophrenia and schizoaffective disorder.
• Encourage the youth to reach out for help if they need it.