My cardio got decided for me when this
Dena and Her Rats II by Rhonda Manning
I went out of my way to go to a gym with a StairMaster. I signed up for 30 minutes, turned on the MP3 and didn't stop until I had climbed 100 floors. Next, I got on the treadmill and, just to get the anger completely out of my system, I did a few kickbacks, lateral raises and shoulder presses.
I'm all better now.