Disturbed- Indestructible would have to be my personal favorite when lifting weights but for cardio I like listening to Girl Talks album "Feed the Animals". It really keeps me going and my mind off thinking about the actually running session.
Rascal Flatts - Life is a Highway makes my ears bleed...
I like to go with anything from Hatebreed. They're pretty much 'Stop bitching about your life. Take control. Don't take **** from people. Let no one obstruct your ascension into supremacy.'