Being able to improvise is the basis for creating all characters and situations, for everything to do with performing, really. And it's good therapy as well.
I travel abroad constantly on book promotion and research, and the Internet is invaluable to me for accessing U.K. news in places such as America, which most of the time hasn't heard of England.
You largely constructed your depression. It wasn't given to you. Therefore, you can deconstruct it.