Not trying to give you a hard time, this is of course good advice, but please never tell that to anyone you care about in a depressive episode. Time and place. Virtually every person with depression has been given this advice a million times. If it were just that, they would have done it. It took me a long time to accept that it just isn't that simple for people with long term depression. That is a huge part of fighting it long term, but those habits are hard to gain and easy to lose, putting someone back in the hole. People with depression also just need people. Support, acknowledgement of their struggle, listening, acceptance. I have a strong inclination to help people fix things. My younger self had a hard time accepting there were things I could not fix or figure out.