Time vs. Distance

On Fridays I change up my run a little. I try to give up my time for distance. I had run a mile and a quarter all week and yesterday I did a mile and a half. It took 20 minutes and 10 seconds. I ran a mile and a quarter in 18 min and 54 seconds, longer than it took me the rest of the week, but since I increased my distance, so it's ok. Anyone else do that? Do you ever give up time to go further? So next week I will be working on improving my mile and a half time. I may have to work on this for more than one week, so next Friday I probably won't do my time vs. distance.
I also need to change my play list on my mp3 player. I actually think I do better without music, but want a good playlist so that when I do use it, I don't feel like just stopping when I'm tired. I love the music that's on it now, but I think I need something a little faster for now.
So, tell me a little about your workout routine. What are you working on, what routines are you doing? I am running every day, except the weekends, and doing p90x in the evenings.