My mother passed away from cancer when I was 11. Originally when she learned she was terminal, she thought it might be a good idea for me to attend support sessions with the school counselor. Unfortunately in this case, the counselor wasn’t that great at their job, and I came home from school talking about how I was “anxious” and “depressed”—words I had never used before. My mother pulled me out of counseling and told my father, “I didn’t put him in there to feel sorry for himself about the situation.”
She also told my sister and I before she passed to never use her death as an excuse to go through life miserable and sad—there were too many things to be happy about and we should give life purpose.
So I agree with the gist of Charlie’s idea of acting like you aren’t a victim even if you do happen to be one.
That said... I also think that due to either genetic predisposition or extreme environmental factors, there are rare cases where trying to take a positive attitude does not help and can in fact make things worse. Trying to use sheer force of will to “power through” certain situations may lead one to ignore other options (medication for example) and the build-up of a series of continuous failures to “think positively” may result in even worse outcomes where erratic or irreversible decisions are made during an irrational state of mind. I’m not suggesting self-pity, but rather the recognition that there are just some situations you can’t put a positive spin on and it is probably better not to try.