Pocket-To-Do is a simple, printable and pocketable to-do list and weekly agenda designed by programmer Adam Bielinski.
(Click the image above for a closer look.)
The idea is to print out a sheet, cut it in half, and fold them in half twice. You write your weekly plans on the left pane, and your agenda on the right. The grey area marks roughly when it is dark out.
Not much to it beyond that, but we are suckers for great printable productivity tools.
Pocket To-Do [github]