Jogged 12 minutes (figured that was a mile; I was going pretty slowly this morning), walked 3 minutes, jogged 3 minutes, walked 4 minutes, jogged 5 minutes, walked 3 minutes.  Now do the math.  Did I make my 30 minute goal? :)

I didn't feel like jogging, but the interval thing made it easier and I got a better workout than just walking.  Nothing wrong with "just" walking.  I'm trying to keep my exercise level up after running the 5k at the beginning of Aug.  It's been a struggle since then.