How to improve sleep habits to support emotional wellness, according to a therapist

I worked recently with a 25-year-old man struggling at his job. He described difficulty thinking clearly and missing too many days. And his relationship with his girlfriend was nearly over due to his admitted neglect. Diagnosed with both depression and anxiety, he said he felt disengaged in his life. He had been in therapy before for a couple of years, and had tried medications for depression, anxiety and attention issues. Nothing seemed to work.