At least napkins are less costly than tattoos

I finally started organizing my ideas today. They've gone from haphazardly scrawled fragments to haphazardly scrawled sentences in a pretty notebook. Will I ever stop scribbling all over restaurant napkins? Probably not. I've started to develop the odd Memento-reminiscent habit of leaving myself notes all over the place. The weird thing is I don't remember leaving them until much, much later, or sometimes never. Sometimes there are sticky notes in my sock drawer. Sometimes there's a letter in the fridge. Sometimes I have Sharpie all over my elbow. My eccentricities are taking me over. How does the rest of the civilized writing world keep track of all their little ideas for stories? I can't carry around notebooks wherever I go--my purse already weighs about ten pounds. I'll find a better system someday. Or maybe I won't.