I've discovered that, when I am in a bad mood, I don't want to be cheered up as much as agreed with. In that spirit, I offer the following
as theme music for various negative states of mind.
Hating everybody:
"Splendid Isolation" by Warren Zevon
Frustration with news about other countries:
"Political Science" by Randy Newman
Thinking about blowing up a certain religious organization ( guess who?)
"Ticking" by Elton John
if your girlfriend turns gay
"All the Young Girls Love Alice" by Elton John
and facing job loss due to redundancy
"A Pirate Looks at 40" by Jimmy Buffett
metatron