I disagree - certainly about the steps. I use the Moves app on the iPhone, which tracks, without me having to think about it, how far I walk on a daily basis. I

I disagree - certainly about the steps. I use the Moves app on the iPhone, which tracks, without me having to think about it, how far I walk on a daily basis. I've found that it's motivated me to walk further than I used to. I have a choice on a daily basis whether to walk to work, catch the bus all the way or do some combination of the two. It used to be easy to convince myself that I was walking further than I actually did (things like "I only caught the bus half way today, that's almost the same as walking the whole distance"). But when I've got an app tracking me every step of the way, that's not possible. I can get to Thursday, check my app and realise that I'm several miles short of where I should be, so if I'm going to hit my targets for the week I'd better get walking. If anything, I'd love to be able to capture more stuff about my life automatically - it would be a lot harder to convince myself that the doughnut I've been given doesn't count because it was free (or whatever my latest lie to myself is) if I've got an app telling me otherwise. Most people lie to themselves about things like the amount of exercise they do, the amount of junk food they eat and the amount of alcohol they drink. If they could have the truth presented to them as cold hard fact, that would probably be quite an eye opener.