calendar in sketchbook, a photo by vickylw on Flickr.
Through the last 3 months of medical stuff, I have tried to keep a record for doctors on when, how often, and how severe. At first I folded the calendar sheets and tucked them in the pocket at the end of my sketchbook.
Then I thought, for convenience, why not tape them flat on the last page, using this removable double-sided tape? There are 4 month pages here, taped on top of each other at the upper edge --- I can easily flip to see other months. And when I fill this sketchbook, the whole thing removes to be placed in the new sketchbook.
I found the blank calendar sheets at Walmart, but they could also be easily printed at home. The tape was found in the scrapbook section of Hobby Lobby.