A great low-tech way of taking down notes, ideas, and quotes are using those cheap memo books you get at the office store. They fit nicely in any jean back pocket and make you feel important, like a reporter on the beat. It takes me about a month or two to go through one, and I store them all for future reference (for some day when I write a movie and need jokes). Here’s a sample page with cool 3D zoom-in effect:
Bonus points if you can read under that. Only thing is you need to carry a pen at all times.