Something I always tell people is you can be a super positive person and look at the bright side but still struggle with anxiety and depression. I always do my best to look at the bright side of things.
Spontaneous writing is fun and can be really helpful for clearing the mind whether it turns out wonderful or not. Plus writing is a perspective not everyone likes the same styles of writing, or topics so it is good to be you and free about it.
Maintaining a positive attitude has helped me in reducing stress and anxiety, actually.
I make every effort not to dwell on the past, which is something I've seen I may have used to do, I now views as counterproductive. I'm not sure how many times a person can rehash the same worn out dramas, and issues so I each day I wake up I start my day off with the attitude that whatever comes my way I can handle it!