My joggling training has mostly involved speedwork on the roads, estimating distance and time. For this summer's training phase, I'm going to hit the track again once a week. Today's workout was 5 x 800m in 2:30 with a one-lap slow jog in between each. The track is very humbling, in that the distance is fixed, the clock is running and you'd better get moving to hit your time goal.
The great thing about the track is that you know what kind of shape you're in, and I'd say I'm actually in pretty decent shape at this stage in my training for the fall marathon.