I was Randel Plowman's Collage a Day project & decided to do the same for one month. It took me a few years and several of Randel's excellent online workshops (where I met a supportive network of kindred spirits) to work up to it. Phewwwww, I managed to do it, and managed to go with the flow when the collages started to morph into mixed media paintings.
* It was easier than I thought, but not easy.
* It was a little scary because I was entering into unknown territory and did my best creating in a kind of meditative state. I feel like I've become a better artist but on the downside a slightly weirder person. I was already weird enough already!
* I'm going to continue because it feels like some kind of journey/quest at this point. I'm plan on experimenting with working larger (something I've never done).
I would definitely recommend committing to this kind of challenge in a chosen medium or more broadly to do anything creative as a daily practice. I also found Noah Scanlin's book 365 Make Something Every Day and Change your Life very inspirational. The subtitle is "Make Something Every Day and Change Your Life". Inside the book Noah talks about his experience and says "results may vary" but that "small, incremental steps I took every day added up to something much bigger than the individual parts".