What can I do in 25 days?

My friend Nikki has proposed an interesting challenge. Handel composed The Messiah in 25 days. What can I do in 25 days? She is recording her own challenge here, where we can all follow along. I am thinking of potential challenges for myself, but I'm having trouble deciding whether do to a material challenge or a personal one. A material challenge would be something like organizing all of the photos in my house, or designing and implimenting my new craft space in the attic. A personal challenge would be something like becoming more active, or working on my relationships. Maybe I'll pick one of each if I'm feeling ambitious.