When I ran back in college (2006) I never recorded mileage or times, I had a general idea but never kept track of it. Back then, I did it more to relieve stress and to get into shape. I didn't even own a fitness watch, I just put in my ear buds and ran. A year ago (4/11/11), when I started running again, I got a little notebook and started writing down miles and times. I found this to be a great motivator! I loved to see my mileage increase or my time drop! I ran for two months and then we had a crazy heat wave and just stopped. I ran a couple of times in the fall. But now I'm gearing up for the long haul!
I got an app on my phone (iMap My Run) that records the miles and times for me! And then it even tells me the pace I was running at. Could it get much easier? Only downside, is that I can see where my mileage was a little off before from doing it on MapQuest or driving it in the car. But I love that I now how that accuracy that I can rely on!
Jeff Galloway suggests a little more detail:
Time of run
Any special segments of the run (speed, hills, race, etc.)
How did you feel (1-10)
I think I'm going to not do as much detail, but definitely use some of his suggestions!