"To Do" lists must be an important part of the human condition (1. Hunt 2. Gather 3. Eat 4. Sleep), which surely explains even the earliest office management software included an automated To Do list.
But it turns out that some of us can't handle automated To Do lists (my own automated list still has items from 2008). We have, perhaps shamefully, gone back to paper lists. Is there hope for us?
If you feel absolutely compelled to use dye suspended in solvent and fabricated treeware to make lists, you go for it. Once you've written your list the old-fashioned way, whip out your iPhone, open Retro List and take a picture of your opus. Click "manage" to view your digitized list. Then swipe your finger on the screen to cross out completed items. Problem solved!
Image: Actual list from Johnny Cash, courtesy of Julien's Auctions.
Image Hat Tip: Lists of Note