I couldn't make up my mind, so here was the final decision: I'll do challenge #1 (write something every day), and challenge #2 (post something on my blog once a week), and challenge #3 (do an exercise challenge monthly), and try to finish a story (modified challenge #5).
And who knows, maybe I'll write a play this year too, and get #4 as well. :)
The main difficulty with this that I see, is that there is no way to "get ahead" or to "catch up" as there has been the last two years. The goal is to write every day, not write 365 things. This will be hard for me. I had some problem yesterday even, and I'm only three days in. But, I managed to write out a quick poem at one point during the crazy day, and thus fulfilled the requirements.