This is exactly the problem we're trying to solve with <a href="http://exist.io" rel="nofollow">http://exist.io</a>.<p>For the moment we're starting small and just trying to pull in activity tracker data (Fitbit, Jawbone, Withings etc) and some secondary services that provide useful quantifiable data - things like Foursquare checkins, Gmail, task management tools, productivity trackers, etc. It's hard to interface with every service when you're writing custom API clients for each of them. And on the other hand, if you try to dictate a common standard without any clout to back it up, you just end up with <a href="http://xkcd.com/927/" rel="nofollow">http://xkcd.com/927/</a>. We're working on an API to export all your data too, so people can build visualisations and apps on the aggregates of their data.<p>Tracking things has to be as frictionless as possible, so I'm wary of manual tracking unless you're already quite committed, or it takes mere seconds - the interface in #2 looks like a good way to approach this. But we're avoiding this for now.<p>The other thing we strongly agree on is #4 - you need insights, not just data! Numbers alone are of limited value, and a lot of people already into Quantified Self end up with "number fatigue" where they're no longer motivated to put in the effort to track things, let alone work towards a goal, just so they can see the number go up. People need to qualify their data and make it part of a narrative about their life. They also need actionable feedback, which is where we're trying to focus on providing value - if you're trying to be more productive, on which days is that working, and what are the factors behind it? We'll try and tell you so you can focus on that. Same process for becoming more active or anything else.<p>It's a big problem to solve, but so many possibilities too.