Just a few aggressive suggestions:
Stop shaming mentally ill people for being too scared to go to therapy, keep giving them gentle encouragement and support instead
Stop shaming mentally ill people for laying in bed all day, understand that their illness can be extremely exhausting instead
Stop shaming mentally ill people for taking medication, remind them to take it and refill their prescriptions instead
Stop shaming mentally ill people for “letting themselves” be mentally ill, encourage them to make healthier life choices and praise them for trying instead
Stop shaming mentally ill people for being too ill to keep up with their hygiene, offer to help in any way they’re comfortable with and remind them every once in a while to brush their teeth or bathe instead
Stop shaming mentally ill people for self harm, ask if their wounds are cleaned out and suggest alternatives instead