I went running yesterday and today and both times I forgot the friggin iPod and thus have NO logged kilometers despite the fact that I covered 9 km in sweat. Oh well, vanity, I'll do it over. another day.
Also, know what happened to me? I had my Nike+ thing calibrated wrongly. Turns out I've been running much faster and further than I've thought.
Since I forgot the iPod at home, I couldn't run with music and so had to focus on birds singing, the scent of raspberries in the forest, the sight of ripe blueberries and the sound of my own breathing. My thoughts came and went.
The entire time I was missing the music like crazy.