The biggest thing that has helped me is the mental reminder that we all have days like this and it will pass. What features were you seeking in an mp3 player that this one lacked?

As for immediate relaxation...music, a hot bath, a good book, eBay if you are into that to sell the one you don't like to recoup some of the money paid for it. If your friend recommended this mp3 player perhaps your friend would buy it off of you.

Exercise is a good way to release built-up tension in the body.