To do list
I have long relied on lists to organize my activities, tasks, and thoughts. I couldn't find any stacks of list paper in stores, so I designed my own.

The first option was a sheet of paper with 3 columns: calls, errands, and chores. I explored options for denoting if a task was completed and settled on a circle to fill in. It was easy, took little ink, and could be done quickly, and visually showed the status of a task:

But, to be convenient, I had to fold the sheet to fit into a pocket. The next version was a card with smaller spaces, but it could fit into a jeans pocket or, with one fold, fit into a shirt pocket. I also learned that I could fill the circles with codes - stars for high priority, a letter for the day of the week it applied to, or a plus or minus:

Notes and sketches

Possible name: A Round Tuit
For those tasks that you put off until you "get around to it." Now, with a round tuit, there's no more excuse. A cute name to make it more commercial.
I later designed a version for use while teaching. There was a blank for assignments to prepare and assignments to grade, plus blanks for notes and other tasks:

Of course, all these versions are obsolete - I now use the calendar and notes functions on my phone.

In the 1970s, pre-computer, I hand ruled the lines and drew the small circles with a template and took the original to a copy/print shop for reproduction. The printer also stacked and glued them into pads of 10 sheets each. The last sheet had contact and reorder information.
Cost estimates: Printing cost about 37 cents each pad of 20 cards.

Test run
Initial, short run, experimental 10 page run
Worley Printers, Austin
Printed on 67 lb Bristol
Blanks: 100
Covers: 50
Make 50 10-page pads with 50 blanks left over.

Concept and design: spring 1978
Marketing notes: September 1978
Production: spring 1979
Test batch printed: Febuary 8, 1979