Myopic friends, weblog Hacker Zen says you can get an instant boost in the clarity of your "far vision" with your fist.
Make your hand into a fist and look through it, as if you were looking through an invisible telescope.... The tiny hole only allows a narrow beam of light to enter the eye... [reducing] the size of the circle of confusion on the retina and increases the depth of field.
I gave this an unscientific test and it seemed effective, but if you've got a better idea of the science of it, let's hear it in the comments. Either way this is no substitute for proper eye care, but it could come in handy as a quick way to read that blurry sign up ahead. And to think I'd always heard that my fist would make me go blind.