It's based on a productivity idea of Jerry Seinfeld's. Here's the blurb from the Writer's Store:
Years ago, when software developer Brad Isaac was performing stand-up at open mic nights, he received his best advice ever from the already-famous comedian.
Seinfeld explained his method for success: each January, he hangs a large year-at-a-glance calendar on his wall and, for every day he wrote new material, he had the exquisite pleasure that can only come from drawing a big red "X" over that day.
Drawing those Xs got to be pretty fun and rewarding, so he kept doing it. Eventually, he began to create a chain of red Xs.
The idea was to never break that chain.
Not only does this approach program the body and mind to sit down and write [or any other creative activity] daily – it also motivates you to continue that beautiful string of big, red Xs. If you don't write/draw, etc. one day, you don't get to draw the X.
It doesn't particularly matter what you write/draw, etc.. It can be anything, as long as you're actively and routinely pushing yourself.
The calendar pdf download is simply boxes numbered 1-365. I decided to use green check marks instead of red X's, it just feels friendlier. I might also use red X's to indicate the days I don't accomplish any work.
I still haven't decided if I'm going to do this for just the film, for a combination of the film and drawing practice, or separate ones for the film and drawing practice. When I decide, I'll post them so you can see the progress.