The sleep is a natural intermittent state of rest for the mind and body, in which the eyes close and consciousness is almost lost, so that there is a drop off in the body movement and the response to external stimuli. During sleep the brain experiences a characteristic cycle of brain-wave activity that comprises of intervals of dreaming.
Everybody knows that sleep is important and I’m sure most people agree that they don’t get enough of it. Sleep is such an important part of our lives that without it we would die. Without adequate sleep we get a fall in our immune system, reduced concentration levels, memory impairment, mood swings, energy dips and much more.
Depression as an illness that is not totally preventable. Like any illness there are certain things you can do in your life to help offset the severity of depression and its progression.
Depression is a condition that affects a large number of people at some point or another in their lives. If you struggle with persistent feelings of sadness, hopelessness, a sense of dread about the future, a loss of zest and motivation, and shifts in sleep habits or appetite, you might be experiencing depression. Depression needs to be addressed, although there are no proven medications that can entirely cure it, and even if there are a lot of treatments carefully planned and designed for people with such disorder, we have to admit that they are quite expensive. There are natural remedies for depression readily available for those who cannot afford to undergo costly medical treatments. 
When people talk about depression, they usually mean a person who is feeling down and lethargic, and who has generally lost interest in life. Or If you have severe depression you may experience low mood, loss of interest and pleasure as well as feelings of worthlessness and guilt. You may also experience tearfulness, poor concentration, reduced energy, reduced or increased appetite and weight, sleep problems and anxiety. You may even feel that life is not worth living, and plan or attempt suicide.