One of the most compelling moments of the movie Memento, for me, was when the lead character, who is suffering from complete loss of short-term memory, revealed a series of tattoos on his body to remind him of vital facts that he needed to know in order to survive. What else is as enduring or as accessible as a tattoo? My sister is such a post-it addict, that she not only uses a Stickies program, but she also keeps the actual post-its attached to her monitor. And then there are more post-its along her path out to the front door, and then a great big one on the front door to remind her of why she's leaving. How much easier would her life be if she could just tattoo those reminders on her body instead?

Now she sort-of can, with ToDo-tattoos, temporary tattoos with lines for making neat to-do lists right on your hand. They come with a skin safe marker so you can write on the tattoos without fear of death by ink poisoning. This is one step towards my dream of having an e-ink display embedded in my palm (and another one in my husband's forehead because I always have to remind him that he's supposed to remind me to do something).

ToDo tattoos are $3.50 for a pack of 12.