Share 'Practice'

When you sit down to play, what do you practice? Do you just jam, or are there specific exercises that have really worked for you? I'm a beginner. Although I've had some lessons in the past, right now, though, I'm teaching myself. I work out of a great beginner/intermediate level book, mostly rudiments and various exercises. I also play to music when I can. I just got a CD called "Turn it Up and…