What are the tell tale signs of depression?

Classic Signs: The classic signs of depression are: prolonged mood of depression, changes in sleep, decreased interests in enjoyable activities, feelings of guilt, decreased energy, decreased concentration, changes in appetite, decreased initiation of movement and activity, and thoughts of death or suicide.

Despair: Note inexplicable despair, anxiety, difficulty deciding, concentration, intrusive dark thoughts & mood, difficulty enjoying, no motivation, this just isn't the you we all knew, too much or too little sleep-same with appetite.Guilt, your fault; feel that somehow your ''badness'' causes irrational hurt. Thoughts of suicide. Your family will notice early on. See an excellent psychiatrist.