I just came up with a similar idea for myself, stopped by for pointers, and found this article. I just picked up a large Moleskine Cahier for a journal. But I want it to be for daily task management as well. So, I draw a box for "Today" wherever I left off in the journal. I use that box in the same way you use your "Today" Circa page: MIT's, calendar, jot space, etc. Then, I journal away after the box, knowing that I'll start a new box tomorrow morning. I like the idea of keeping my actions linked to my thoughts for the purpose of reflection.