The best writing advice I have heard was I think from my mind.
It: You are sad, aren't you?
I: Yes.
It: Do something.
I: Like what?
It: Write your emotions down. Write anything, you can mould your condition/emotions into a poem, a play, a short story, starting pages of a novel, anything it can be. You would feel better.
It was right. Most of the poetry I have produced was by following this advice. I wonder if it's a problem? Being able to write only in hard times!