Whenever I come across something I like in a book or online, I copy it down onto a card. I don’t just make cards for overtly inspirational stuff; I also have sections in the box for funny things, good descriptions, dialogue, and research. I’ve been keeping the cards since the start of the year and have managed to build up a nice collection with very little effort on my part (which is the main criterion for any self-improvement project I’m actually going to stick with).
A nice idea. Sort of like building one’s own Oblique Strategies.