Well basically I'm talking about giving a public, visible reward for activities that we should be doing anyway (or want to do but can't work up the motivation to overcome our laziness). Getting exercise that we really need, eating healthier, being more creative, etc. Not just rewarding unpleasant things for no reason. I share your aversion to arbitrary rewards, kaijyuu, although even I can't deny that we seem to have an instinct to seek out rewards, even if there's no real reason to do so. I catch myself doing it all the time. I try to avoid it, and generally try to stop if I catch myself doing it, but it's just our nature. No reason not to take advantage of that for self-improvement reasons. After all, if I hadn't signed up for the 52 books challenge, I definitely would not have read 8 books so far this year. It's the external encouragement that motivates me. I tell myself all the time that I should read more but never really do it, but now I have a tangible goal and other people also working towards it who can see my progress, so I'm reading every day.
My current idea for making it balanced is that each person would get a blank "list" to fill with goals. X would be "minor" goals (5 points, for example), X "medium" (maybe 15 points), X "difficult" (30 points?), and X "heroic" (50 points?). Everyone has the same number of goals for each point value, for each day. Then you can change it the next day, or keep the same ones, or whatever. Or we could do it weekly instead, since not everyone can get online every day.
Somewhere we'd have to keep a list of standardized goals and their point values. Then each person could personalize it with details. So, for example, we could have "Achieve a minor artistic goal (easy - 5 points)" as a general goal, and someone could take that and adjust it to "fill one page of my sketchbook" or what have you.
If we can get enough people interested, it might even be worth starting a small forum just for this. Everyone could have their own thread with their daily/weekly goals summed up and their point total kept in the first post, and then someone else (probably me, at least at first) keeping a list in a stickied thread of everyone's point totals, updated as often as possible.
Thoughts?