A holiday challenge

I've been thinking about this and thinking about this, having been totally unsure if I wanted to move forward with it. I know that if I make it public, then I'll be committed to finishing it, which is probably why I haven't mentioned it. I just wanted to be 100% sure I want to do it.

I used to do monthly challenges for myself, and somewhere along the way, I got out of the habit of doing them. Right now, I haven't really been focused on anything. Last year, I was hardcore into getting down to my racing weight and then training for my 10K; this year, I'm loosely counting calories, trying to lose the summer weight, but not really putting much effort into it.
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