I recently moved house and didn't draw anything for about a month, so I set myself a 'draw your day' challenge to get drawing back into my routine. I originally planned to do it for the whole month of August, but I found it had served its purpose by the 12th (that is, I had started to have other ideas again), so I stopped there.
I learned a few things doing these too, like that William Morris pattern only has 3 hues. I would never have realised without copying it!