Sleep is everything. With consistent quality sleep, we think clearer, have better stress tolerance, eat well, focus more, have improved immunity etc. Sleep is highly correlated with mental health. Poor sleep or lack of sleep is strongly linked to lack of focus, depression, anxiety, schizophrenia, weight gain, slowed brain development etc. Research indicates that cognitive behavioral therapy positively impacts individuals, especially older, making them more likely to have better sleep quality and longer duration of sleep and significant improvements in mood stability and overall cognitive functioning.