Have a nice, friendly "Help" button.
It isn't obvious how one interacts with the various parts of a goal page. For example, a naive user won't automatically figure out how to enter in data for the day. How about a nice big friendly "Help" button, maybe in green or something else that stands out, to give users some ideas on how to use UI.

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Admindreeves (Cofounder, Beeminder) commented
@Fruitful, want to stop by http://beeminder.com/chat ?
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Admindreeves (Cofounder, Beeminder) commented
Agreed! Can't tell you how much we appreciate these comments and ideas! Btw, the video that Fruitful is presumably referring to is http://dreev.es/howtobee and is a bit out of date, though I think still useful (and super cute in my biased opinion!).
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Fruitful commented
Yes, I have no idea what to do even after watching the video.
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Anonymous commented
Yep-- As a brand new user, the goal page is not very intuitive for me at all. I was just wondering where in the world to enter the data. A Help button, or a sample goal page on first sign-in, with the handy rollover texts explaining what each part of the page does or something, would be helpful.