One of the ways that depression works to gain control of a person's life is to instill a perception of changelessness. You always felt this way; it's not a disease so much as it is who you are. Nobody ever cared and you should not waste anybody's time by telling them your problems. Happiness is not meant for your life. The dark cloud that surrounds a depression victim makes it impossible to see things that are positive, helpful, promising.
Now comes a tool from the Families for Depression Awareness that can help remove that metaphorical blindness. It allows a victim to see progress that is made in treatment by carefully tracking it. It's a simple concept but a very important one. It breaks that perception that nothing has ever changed and nothing ever will change by showing, in the victim's own words, what things were like yesterday, last week, last month.
By involving family it also helps break down the belief that you're alone in this journey. Solitude is depression's friend, and it withers if you convince the victim that they are not alone. Mind you it takes a consistent effort to make that point, and even minor setbacks can bring you all the way to Square One, but this tool is a good way to involve the people that care about the victim and help them reinforce that fact.